virus tail, sheath / symbiont genome ejection through host cell envelope, contractile tail mechanism / viral capsid, decoration / symbiont entry into host cell via disruption of host cell wall peptidoglycan / T=13 icosahedral viral capsid / viral genome packaging / virus tail, baseplate / viral tail assembly / virus tail, fiber / symbiont entry into host cell via disruption of host cell envelope ...virus tail, sheath / symbiont genome ejection through host cell envelope, contractile tail mechanism / viral capsid, decoration / symbiont entry into host cell via disruption of host cell wall peptidoglycan / T=13 icosahedral viral capsid / viral genome packaging / virus tail, baseplate / viral tail assembly / virus tail, fiber / symbiont entry into host cell via disruption of host cell envelope / viral release from host cell / peptidoglycan catabolic process / virion component / cell wall macromolecule catabolic process / viral capsid / lysozyme / lysozyme activity / killing of cells of another organism / entry receptor-mediated virion attachment to host cell / defense response to bacterium / symbiont entry into host cell / structural molecule activity / metal ion binding / identical protein binding Similarity search - Function
Bacteriophage T4, Gp14, neck protein / Virus neck protein / Portal protein Gp20 / Bacteriophage T4-like portal protein (Gp20) / Highly immunogenic outer capsid protein / Bacteriophage T4, Gp12 / Baseplate tail-tube protein gp48, T4-like virus / Short tail fibre protein, C-terminal / Small outer capsid protein / Myoviridae tail sheath stabiliser ...Bacteriophage T4, Gp14, neck protein / Virus neck protein / Portal protein Gp20 / Bacteriophage T4-like portal protein (Gp20) / Highly immunogenic outer capsid protein / Bacteriophage T4, Gp12 / Baseplate tail-tube protein gp48, T4-like virus / Short tail fibre protein, C-terminal / Small outer capsid protein / Myoviridae tail sheath stabiliser / Small outer capsid protein superfamily / Myoviridae tail sheath stabiliser superfamily / Short tail fibre protein, C-terminal superfamily / Phage short tail fibre protein gp12, middle domain / Tail-tube assembly protein / Short tail fibre protein receptor-binding domain / T4-like virus Myoviridae tail sheath stabiliser / Small outer capsid protein / Baseplate wedge protein gp53, bacteriophage T4 / Baseplate wedge protein gp7 / : / : / : / Base plate wedge protein 53 / Baseplate wedge protein gp7, domain V / Baseplate wedge protein gp7, helical domain / Baseplate wedge protein gp7, domain VI / Bacteriophage T4, Gp27, baseplate hub, C-terminal / Bacteriophage T4, Gp27, baseplate hub, N-terminal / Gp27, baseplate hub, domain 3 / Gp27, baseplate hub, domain 4 / Gp27, baseplate hub, domain 2 / Baseplate structural protein, domain 2 / Baseplate structural protein, domain 1 / Baseplate structural protein Gp11 / Bacteriophage T4, Gp11, C-terminal finger domain / Baseplate structural protein Gp11, N-terminal domain superfamily / Baseplate structural protein Gp11 superfamily / Major capsid protein, Myoviridae / Baseplate structural protein Gp11, C-terminal domain / : / GP11 baseplate wedge protein / Tail sheath protein Gp18-like domain I / Major capsid protein Gp23 / Baseplate wedge protein gp10 / Baseplate wedge protein gp6 / Phage tail collar domain superfamily / : / : / : / : / : / : / Baseplate wedge protein gp6-like, helical domain / Baseplate structural protein gp6, C-terminal domain I / Baseplate structural protein gp6, C-terminal domain II / Baseplate wedge protein gp6, domain II / Baseplate structural protein gp6, C-terminal domain III / Baseplate wedge protein gp10 domain 3 / Capsid protein, T4-like bacteriophage-like / Phage tail collar domain / Baseplate structural protein Gp9 C-terminal domain superfamily / Phage Tail Collar Domain / Bacteriophage T4, Gp8 / Bacteriophage T4, Gp8 superfamily / Bacteriophage T4, Gp8 / Gp5, C-terminal / Gp5 C-terminal repeat (3 copies) / : / Baseplate structural protein Gp10, C-terminal domain / Baseplate structural protein Gp9/Gp10 / Baseplate structural protein Gp9/Gp10 middle domain superfamily / Gp9-like superfamily / : / Bacteriophage T4 gp9/10-like protein, N-terminal / Bacteriophage T4 gp9/10-like protein, C-terminal / Protein Gp5, N-terminal OB-fold domain / Pre-baseplate central spike protein Gp5 / Gp5 N-terminal OB domain / : / Tail sheath protein Gp18 domain III N-terminal region / PAAR motif / PAAR motif / IraD/Gp25-like / Phage tail sheath protein, beta-sandwich domain / Baseplate wedge protein gp25 / Phage tail sheath protein beta-sandwich domain / Bacteriophage T4, Gp19, tail tube / T4-like virus tail tube protein gp19 / PKD domain / : / Tail sheath protein, subtilisin-like domain / Phage tail sheath protein subtilisin-like domain / Tail sheath protein, C-terminal domain / Phage tail sheath C-terminal domain / PKD domain / PKD domain superfamily / PKD/Chitinase domain / Repeats in polycystic kidney disease 1 (PKD1) and other proteins / Fibritin C-terminal Similarity search - Domain/homology
Tail completion and sheath stabilizer protein / Pre-baseplate central spike protein Gp5 / Tail tube protein / Small outer capsid protein / Phospholipase / Baseplate tail tube cap / Tail sheath protein / Baseplate wedge subunit / Highly immunogenic outer capsid protein / Portal protein ...Tail completion and sheath stabilizer protein / Pre-baseplate central spike protein Gp5 / Tail tube protein / Small outer capsid protein / Phospholipase / Baseplate tail tube cap / Tail sheath protein / Baseplate wedge subunit / Highly immunogenic outer capsid protein / Portal protein / Baseplate wedge subunit and tail pin / Baseplate wedge subunit / Baseplate wedge tail fiber connector / Tail sheath stabilizer and completion protein / Baseplate hub subunit / Baseplate wedge subunit / Major capsid protein / Fibritin / Baseplate wedge protein gp10 / Short tail fiber protein gp12 / Neck protein gp13 / Neck protein gp14 / Tape measure protein / Baseplate tail-tube junction protein gp54 / Baseplate wedge protein gp6 / Baseplate wedge protein gp7 Similarity search - Component
Biological species
Escherichia phage T4 (virus)
Method
ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.8 Å
0: gp14, neck protein 1: gp18, tail sheath protein 2: gp18, tail sheath protein 3: gp18, tail sheath protein 4: gp18, tail sheath protein 5: gp18, tail sheath protein 6: gp19, tail tube protein 7: gp19, tail tube protein 8: gp19, tail tube protein 9: gp19, tail tube protein A: gpwac, fibritin A0: gp20, portal protein A1: gp20, portal protein A2: gp20, portal protein A3: gp20, portal protein A4: gp23, major capsid protein A5: gp23, major capsid protein A6: gp13, neck protein A7: gp23, major capsid protein A8: gp23, major capsid protein A9: gp23, major capsid protein AA: gp19, tail tube protein AB: gp15, tail terminator protein AC: gp3, tube terminator protein AD: gp18, tail sheath protein AE: gp19, tail tube protein AF: gp19, tail tube protein AG: gp19, tail tube protein AH: gp19, tail tube protein AI: gp19, tail tube protein AJ: gp19, tail tube protein AK: gp18, tail sheath protein AL: gp18, tail sheath protein AM: gp18, tail sheath protein AN: gp18, tail sheath protein AO: gp18, tail sheath protein AP: gp18, tail sheath protein AQ: Hoc, highly immunogenic outer capsid protein AR: Hoc, highly immunogenic outer capsid protein AS: Hoc, highly immunogenic outer capsid protein AT: Hoc, highly immunogenic outer capsid protein AU: Hoc, highly immunogenic outer capsid protein AV: gp23, major capsid protein AW: gp23, major capsid protein AX: gp23, major capsid protein AY: gp13, neck protein AZ: gp23, major capsid protein Aa: gp13, neck protein Ab: gp13, neck protein Ac: gp23, major capsid protein Ad: gp23, major capsid protein Ae: gp23, major capsid protein Af: gp23, major capsid protein Ag: gp23, major capsid protein Ah: gp23, major capsid protein Ai: gp23, major capsid protein Aj: gp23, major capsid protein Ak: gp23, major capsid protein Al: gp13, neck protein Am: gp23, major capsid protein An: gp23, major capsid protein Ao: gp23, major capsid protein Ap: gp23, major capsid protein Aq: gp13, neck protein Ar: gp13, neck protein As: gp13, neck protein At: gp13, neck protein Au: gp23, major capsid protein Av: gp20, portal protein Aw: gp23, major capsid protein Ax: gp20, portal protein Ay: gp23, major capsid protein Az: gp23, major capsid protein B: gpwac, fibritin B1: gp18, tail sheath protein B2: gp18, tail sheath protein B3: gp18, tail sheath protein B4: gp18, tail sheath protein B5: gp18, tail sheath protein B6: gp18, tail sheath protein B7: gp18, tail sheath protein BA: gp20, portal protein BB: gp20, portal protein BC: gp13, neck protein BD: gp20, portal protein BE: gp13, neck protein BF: gp20, portal protein BG: gp20, portal protein BH: gp20, portal protein BI: gp23, major capsid protein BJ: gp23, major capsid protein BK: gp23, major capsid protein BL: gp13, neck protein BM: gp23, major capsid protein BN: Soc, small outer capsid protein BO: Soc, small outer capsid protein BP: Soc, small outer capsid protein BQ: Soc, small outer capsid protein BR: Soc, small outer capsid protein BS: Soc, small outer capsid protein BT: Soc, small outer capsid protein BU: Soc, small outer capsid protein BV: Soc, small outer capsid protein BW: Soc, small outer capsid protein BX: gp19, tail tube protein BY: gp19, tail tube protein BZ: gp19, tail tube protein Ba: gp19, tail tube protein Bb: gp19, tail tube protein Bc: gp19, tail tube protein Bd: gp19, tail tube protein Be: gp19, tail tube protein Bf: gp19, tail tube protein Bg: gp19, tail tube protein Bh: gp19, tail tube protein Bi: gp19, tail tube protein Bj: gp19, tail tube protein Bk: gp19, tail tube protein Bl: gp19, tail tube protein Bm: gp19, tail tube protein Bn: gp19, tail tube protein Bo: gp19, tail tube protein Bp: gp18, tail sheath protein Bq: gp18, tail sheath protein Br: gp18, tail sheath protein Bs: gp18, tail sheath protein Bt: gp18, tail sheath protein Bu: gp18, tail sheath protein Bv: gp18, tail sheath protein Bw: gp18, tail sheath protein Bx: gp18, tail sheath protein By: gp18, tail sheath protein Bz: gp18, tail sheath protein C: gpwac, fibritin D: gpwac, fibritin E: gpwac, fibritin F: gpwac, fibritin G: gpwac, fibritin H: gpwac, fibritin I: gpwac, fibritin J: gpwac, fibritin K: gpwac, fibritin K0: gp18, tail sheath protein K1: gp18, tail sheath protein K2: gp18, tail sheath protein K3: gp18, tail sheath protein K4: gp18, tail sheath protein K5: gp18, tail sheath protein K6: gp18, tail sheath protein K7: gp18, tail sheath protein K8: gp18, tail sheath protein K9: gp18, tail sheath protein L: gpwac, fibritin L0: gp18, tail sheath protein L1: gp18, tail sheath protein L2: gp18, tail sheath protein L3: gp18, tail sheath protein L4: gp18, tail sheath protein L5: gp18, tail sheath protein L6: gp18, tail sheath protein L7: gp18, tail sheath protein L8: gp18, tail sheath protein L9: gp18, tail sheath protein LS: gp18, tail sheath protein LU: gp18, tail sheath protein LV: gp18, tail sheath protein LW: gp18, tail sheath protein LX: gp18, tail sheath protein LY: gp18, tail sheath protein LZ: gp18, tail sheath protein La: gp18, tail sheath protein Lb: gp18, tail sheath protein Lc: gp18, tail sheath protein Ld: gp18, tail sheath protein Le: gp18, tail sheath protein Lx: gp18, tail sheath protein Lz: gp18, tail sheath protein M: gpwac, fibritin M0: gp18, tail sheath protein M1: gp18, tail sheath protein M2: gp18, tail sheath protein M3: gp18, tail sheath protein M4: gp18, tail sheath protein M5: gp18, tail sheath protein M6: gp18, tail sheath protein M7: gp18, tail sheath protein M8: gp18, tail sheath protein M9: gp18, tail sheath protein MS: gp18, tail sheath protein MU: gp18, tail sheath protein MV: gp18, tail sheath protein MW: gp18, tail sheath protein MX: gp18, tail sheath protein MY: gp18, tail sheath protein MZ: gp18, tail sheath protein Ma: gp18, tail sheath protein Mb: gp18, tail sheath protein Mc: gp18, tail sheath protein Md: gp18, tail sheath protein Me: gp18, tail sheath protein Mx: gp18, tail sheath protein Mz: gp18, tail sheath protein N: gpwac, fibritin NX: gp18, tail sheath protein NZ: gp18, tail sheath protein Na: gp18, tail sheath protein Nb: gp18, tail sheath protein Nc: gp18, tail sheath protein Nd: gp18, tail sheath protein Ne: gp18, tail sheath protein Nf: gp18, tail sheath protein Ng: gp18, tail sheath protein Nh: gp18, tail sheath protein Ni: gp18, tail sheath protein Nj: gp18, tail sheath protein Nx: gp18, tail sheath protein Nz: gp18, tail sheath protein O: gpwac, fibritin OE: gp19, tail tube protein OF: gp19, tail tube protein OG: gp19, tail tube protein OH: gp19, tail tube protein OI: gp19, tail tube protein OJ: gp19, tail tube protein OK: gp19, tail tube protein OL: gp19, tail tube protein OM: gp19, tail tube protein ON: gp19, tail tube protein OO: gp19, tail tube protein Oj: gp19, tail tube protein Ok: gp19, tail tube protein Ol: gp19, tail tube protein Om: gp19, tail tube protein On: gp19, tail tube protein Oo: gp19, tail tube protein Op: gp19, tail tube protein Oq: gp19, tail tube protein Or: gp19, tail tube protein Os: gp19, tail tube protein Ot: gp19, tail tube protein P: gpwac, fibritin PE: gp19, tail tube protein PF: gp19, tail tube protein PG: gp19, tail tube protein PH: gp19, tail tube protein PI: gp19, tail tube protein PJ: gp19, tail tube protein PK: gp19, tail tube protein PL: gp19, tail tube protein PM: gp19, tail tube protein PN: gp19, tail tube protein PO: gp19, tail tube protein Pj: gp19, tail tube protein Pk: gp19, tail tube protein Pl: gp19, tail tube protein Pm: gp19, tail tube protein Pn: gp19, tail tube protein Po: gp19, tail tube protein Pp: gp19, tail tube protein Pq: gp19, tail tube protein Pr: gp19, tail tube protein Ps: gp19, tail tube protein Pt: gp19, tail tube protein Q: gpwac, fibritin R: gpwac, fibritin RE: gp19, tail tube protein RF: gp19, tail tube protein RG: gp19, tail tube protein RH: gp19, tail tube protein RI: gp19, tail tube protein RJ: gp19, tail tube protein RK: gp19, tail tube protein RL: gp19, tail tube protein RM: gp19, tail tube protein RN: gp19, tail tube protein RO: gp19, tail tube protein RT: gp19, tail tube protein Rk: gp19, tail tube protein Rl: gp19, tail tube protein Rm: gp19, tail tube protein Rn: gp19, tail tube protein Ro: gp19, tail tube protein Rp: gp19, tail tube protein Rq: gp19, tail tube protein Rr: gp19, tail tube protein Rs: gp19, tail tube protein Rt: gp19, tail tube protein S: gpwac, fibritin S0: gp12, short tail fiber protein S1: gp12, short tail fiber protein S2: gp12, short tail fiber protein S3: gp12, short tail fiber protein S4: gp12, short tail fiber protein S5: gp12, short tail fiber protein S6: gp12, short tail fiber protein S7: gp12, short tail fiber protein S8: gp12, short tail fiber protein SA: gp12, short tail fiber protein SO: gp12, short tail fiber protein SP: gp12, short tail fiber protein SQ: gp12, short tail fiber protein Sv: gp12, short tail fiber protein Sw: gp12, short tail fiber protein Sx: gp12, short tail fiber protein Sy: gp12, short tail fiber protein Sz: gp12, short tail fiber protein T: gpwac, fibritin T1: gp9, baseplate wedge tail fiber connector T2: gp9, baseplate wedge tail fiber connector T3: gp9, baseplate wedge tail fiber connector T4: gp9, baseplate wedge tail fiber connector T5: gp9, baseplate wedge tail fiber connector T6: gp9, baseplate wedge tail fiber connector T7: gp9, baseplate wedge tail fiber connector T8: gp9, baseplate wedge tail fiber connector T9: gp9, baseplate wedge tail fiber connector TF: gp9, baseplate wedge tail fiber connector TG: gp9, baseplate wedge tail fiber connector TH: gp9, baseplate wedge tail fiber connector Td: gp9, baseplate wedge tail fiber connector Te: gp9, baseplate wedge tail fiber connector Tf: gp9, baseplate wedge tail fiber connector Tg: gp9, baseplate wedge tail fiber connector Th: gp9, baseplate wedge tail fiber connector Ti: gp9, baseplate wedge tail fiber connector U: gpwac, fibritin UL: gp11, baseplate wedge protein UM: gp11, baseplate wedge protein UN: gp11, baseplate wedge protein Up: gp11, baseplate wedge protein Uq: gp11, baseplate wedge protein Ur: gp11, baseplate wedge protein Us: gp11, baseplate wedge protein Ut: gp11, baseplate wedge protein Uu: gp11, baseplate wedge protein V: gpwac, fibritin VL: gp11, baseplate wedge protein VM: gp11, baseplate wedge protein VN: gp11, baseplate wedge protein Vp: gp11, baseplate wedge protein Vq: gp11, baseplate wedge protein Vr: gp11, baseplate wedge protein Vs: gp11, baseplate wedge protein Vt: gp11, baseplate wedge protein Vu: gp11, baseplate wedge protein W: gpwac, fibritin WI: gp10, baseplate wedge protein WJ: gp10, baseplate wedge protein WK: gp10, baseplate wedge protein Wj: gp10, baseplate wedge protein Wk: gp10, baseplate wedge protein Wl: gp10, baseplate wedge protein Wm: gp10, baseplate wedge protein Wn: gp10, baseplate wedge protein Wo: gp10, baseplate wedge protein X: gpwac, fibritin XI: gp10, baseplate wedge protein XJ: gp10, baseplate wedge protein XK: gp10, baseplate wedge protein Xj: gp10, baseplate wedge protein Xk: gp10, baseplate wedge protein Xl: gp10, baseplate wedge protein Xm: gp10, baseplate wedge protein Xn: gp10, baseplate wedge protein Xo: gp10, baseplate wedge protein Y: gpwac, fibritin YC: gp7, baseplate wedge protein YX: gp7, baseplate wedge protein YY: gp7, baseplate wedge protein Yc: gp7, baseplate wedge protein Yx: gp7, baseplate wedge protein Yy: gp7, baseplate wedge protein Z: gpwac, fibritin ZD: gp8, baseplate wedge protein ZE: gp8, baseplate wedge protein ZZ: gp8, baseplate wedge protein Za: gp8, baseplate wedge protein Zb: gp8, baseplate wedge protein Zc: gp8, baseplate wedge protein a: gpwac, fibritin aD: gp8, baseplate wedge protein aE: gp8, baseplate wedge protein aZ: gp8, baseplate wedge protein aa: gp8, baseplate wedge protein ab: gp8, baseplate wedge protein ac: gp8, baseplate wedge protein b: gpwac, fibritin b0: gp18, tail sheath protein b3: gp18, tail sheath protein b4: gp18, tail sheath protein b5: gp18, tail sheath protein b6: gp18, tail sheath protein b7: gp18, tail sheath protein b8: gp18, tail sheath protein b9: gp18, tail sheath protein bN: gp18, tail sheath protein bO: gp18, tail sheath protein bP: gp18, tail sheath protein bQ: gp18, tail sheath protein bR: gp18, tail sheath protein bY: gp18, tail sheath protein c: gpwac, fibritin cA: gp18, tail sheath protein cB: gp18, tail sheath protein cC: gp18, tail sheath protein cD: gp18, tail sheath protein cE: gp18, tail sheath protein cF: gp18, tail sheath protein cG: gp18, tail sheath protein cH: gp18, tail sheath protein cI: gp18, tail sheath protein cJ: gp18, tail sheath protein cK: gp18, tail sheath protein cL: gp18, tail sheath protein cM: gp18, tail sheath protein cN: gp18, tail sheath protein cO: gp18, tail sheath protein cP: gp18, tail sheath protein d: gpwac, fibritin dS: gp18, tail sheath protein dT: gp18, tail sheath protein dU: gp18, tail sheath protein dV: gp18, tail sheath protein dW: gp18, tail sheath protein dZ: gp18, tail sheath protein e: gpwac, fibritin eB: gp6, baseplate wedge protein eU: gp6, baseplate wedge protein eW: gp6, baseplate wedge protein f: gpwac, fibritin f9: gp6, baseplate wedge protein fA: gp6, baseplate wedge protein fB: gp6, baseplate wedge protein fR: gp6, baseplate wedge protein fS: gp6, baseplate wedge protein fU: gp6, baseplate wedge protein fW: gp6, baseplate wedge protein fr: gp6, baseplate wedge protein fs: gp6, baseplate wedge protein g: gpwac, fibritin gE: gp5, baseplate central spike protein gG: gp5, baseplate central spike protein gH: gp5, baseplate central spike protein gd: gp5.4, tip of the central spike h: gpwac, fibritin h1: gp19, tail tube protein h2: gp19, tail tube protein hI: gp19, tail tube protein hJ: gp19, tail tube protein hK: gp19, tail tube protein hL: gp19, tail tube protein hM: gp19, tail tube protein hX: gp19, tail tube protein he: gp19, tail tube protein hf: gp19, tail tube protein hg: gp19, tail tube protein hh: gp19, tail tube protein hi: gp19, tail tube protein hj: gp19, tail tube protein hk: gp19, tail tube protein hl: gp19, tail tube protein hm: gp19, tail tube protein hn: gp19, tail tube protein ho: gp19, tail tube protein hp: gp19, tail tube protein hq: gp19, tail tube protein hr: gp19, tail tube protein hs: gp19, tail tube protein ht: gp19, tail tube protein hu: gp19, tail tube protein hv: gp19, tail tube protein hw: gp19, tail tube protein hx: gp19, tail tube protein hy: gp19, tail tube protein hz: gp19, tail tube protein i: gpwac, fibritin iC: gp27, baseplate hub protein iD: gp27, baseplate hub protein iF: gp27, baseplate hub protein j: gpwac, fibritin ja: gp29, tape measure protein jb: gp29, tape measure protein jc: gp29, tape measure protein k: gp14, neck protein k3: gp53, baseplate wedge protein k4: gp53, baseplate wedge protein k7: gp53, baseplate wedge protein k8: gp53, baseplate wedge protein kV: gp53, baseplate wedge protein l: gp14, neck protein lV: gp53, baseplate wedge protein m: gp14, neck protein m1: gp25, baseplate protein m2: gp25, baseplate protein m5: gp25, baseplate protein m6: gp25, baseplate protein mT: gp25, baseplate protein n: gp14, neck protein nT: gp25, baseplate protein o: gp19, tail tube protein o0: gp48, baseplate protein o1: gp48, baseplate protein o2: gp48, baseplate protein o6: gp48, baseplate protein p: gp14, neck protein pA: gp48, baseplate protein pB: gp48, baseplate protein q: gp15, tail terminator protein q3: gp54, baseplate protein q4: gp54, baseplate protein q5: gp54, baseplate protein q7: gp54, baseplate protein q8: gp54, baseplate protein q9: gp54, baseplate protein r: gp15, tail terminator protein rc: unassigned peptide A rd: unassigned peptide A re: unassigned peptide A rf: unassigned peptide A rg: unassigned peptide A rh: unassigned peptide A s: gp15, tail terminator protein sQ: unassigned peptide B sT: unassigned peptide B sU: unassigned peptide B t: gp15, tail terminator protein tS: unassigned peptide C tX: unassigned peptide C tY: unassigned peptide C u: gp15, tail terminator protein uR: unassigned peptide D uV: unassigned peptide D uW: unassigned peptide D v: gp3, tube terminator protein vZ: unassigned peptide E va: unassigned peptide E vb: unassigned peptide E w: gp3, tube terminator protein x: gp3, tube terminator protein y: gp3, tube terminator protein z: gp3, tube terminator protein hetero molecules