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- EMDB-54691: Ternary PROTAC-mediated complex consisting of Cereblon, DDB1 and ... -

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Entry
Database: EMDB / ID: EMD-54691
TitleTernary PROTAC-mediated complex consisting of Cereblon, DDB1 and BRD4-BD1, non-covalently linked by JQ1-AcN
Map datacomposite map
Sample
  • Complex: Ternary PROTAC-mediated complex consisting of Cereblon, DDB1 and BRD4-BD1, non-covalently linked by JQ1-AcN
    • Protein or peptide: Protein cereblon
    • Protein or peptide: DNA damage-binding protein 1
    • Protein or peptide: Bromodomain-containing protein 4
  • Ligand: ZINC ION
  • Ligand: N-[(2S)-1-[[(3S)-2,5-bis(oxidanylidene)pyrrolidin-3-yl]amino]-1-oxidanylidene-propan-2-yl]-9-[2-[(9S)-7-(4-chlorophenyl)-4,5,13-trimethyl-3-thia-1,8,11,12-tetrazatricyclo[8.3.0.0^{2,6}]trideca-2(6),4,7,10,12-pentaen-9-yl]ethanoylamino]nonanamide
Keywordsternary complex / PROTAC / cereblon / LIGASE
Function / homology
Function and homology information


negative regulation of monoatomic ion transmembrane transport / positive regulation by virus of viral protein levels in host cell / spindle assembly involved in female meiosis / epigenetic programming in the zygotic pronuclei / UV-damage excision repair / biological process involved in interaction with symbiont / regulation of mitotic cell cycle phase transition / WD40-repeat domain binding / Cul4A-RING E3 ubiquitin ligase complex / Cul4-RING E3 ubiquitin ligase complex ...negative regulation of monoatomic ion transmembrane transport / positive regulation by virus of viral protein levels in host cell / spindle assembly involved in female meiosis / epigenetic programming in the zygotic pronuclei / UV-damage excision repair / biological process involved in interaction with symbiont / regulation of mitotic cell cycle phase transition / WD40-repeat domain binding / Cul4A-RING E3 ubiquitin ligase complex / Cul4-RING E3 ubiquitin ligase complex / Cul4B-RING E3 ubiquitin ligase complex / ubiquitin ligase complex scaffold activity / negative regulation of reproductive process / negative regulation of developmental process / locomotory exploration behavior / RNA polymerase II C-terminal domain binding / cullin family protein binding / P-TEFb complex binding / viral release from host cell / negative regulation of DNA damage checkpoint / histone H4 reader activity / host-mediated suppression of viral transcription / positive regulation of G2/M transition of mitotic cell cycle / positive regulation of Wnt signaling pathway / ectopic germ cell programmed cell death / positive regulation of T-helper 17 cell lineage commitment / negative regulation of protein-containing complex assembly / positive regulation of viral genome replication / proteasomal protein catabolic process / : / positive regulation of gluconeogenesis / RNA polymerase II CTD heptapeptide repeat kinase activity / condensed nuclear chromosome / transcription coregulator activity / nucleotide-excision repair / positive regulation of protein-containing complex assembly / positive regulation of transcription elongation by RNA polymerase II / Recognition of DNA damage by PCNA-containing replication complex / regulation of circadian rhythm / DNA Damage Recognition in GG-NER / Dual Incision in GG-NER / Transcription-Coupled Nucleotide Excision Repair (TC-NER) / Formation of TC-NER Pre-Incision Complex / Formation of Incision Complex in GG-NER / Wnt signaling pathway / Dual incision in TC-NER / Gap-filling DNA repair synthesis and ligation in TC-NER / positive regulation of protein catabolic process / cellular response to UV / p53 binding / rhythmic process / chromosome / site of double-strand break / Neddylation / regulation of inflammatory response / ubiquitin-dependent protein catabolic process / protein-macromolecule adaptor activity / histone binding / Potential therapeutics for SARS / proteasome-mediated ubiquitin-dependent protein catabolic process / damaged DNA binding / transmembrane transporter binding / transcription coactivator activity / chromosome, telomeric region / positive regulation of canonical NF-kappaB signal transduction / transcription cis-regulatory region binding / protein ubiquitination / chromatin remodeling / DNA repair / protein serine/threonine kinase activity / apoptotic process / DNA damage response / chromatin binding / regulation of transcription by RNA polymerase II / negative regulation of apoptotic process / chromatin / positive regulation of DNA-templated transcription / protein-containing complex binding / nucleolus / perinuclear region of cytoplasm / enzyme binding / positive regulation of transcription by RNA polymerase II / protein-containing complex / extracellular space / DNA binding / extracellular exosome / nucleoplasm / metal ion binding / nucleus / membrane / cytoplasm / cytosol
Similarity search - Function
Yippee/Mis18/Cereblon / Yippee zinc-binding/DNA-binding /Mis18, centromere assembly / CULT domain / CULT domain profile. / Lon N-terminal domain profile. / Lon protease, N-terminal domain / Lon protease, N-terminal domain superfamily / ATP-dependent protease La (LON) substrate-binding domain / Found in ATP-dependent protease La (LON) / RSE1/DDB1/CPSF1 second beta-propeller ...Yippee/Mis18/Cereblon / Yippee zinc-binding/DNA-binding /Mis18, centromere assembly / CULT domain / CULT domain profile. / Lon N-terminal domain profile. / Lon protease, N-terminal domain / Lon protease, N-terminal domain superfamily / ATP-dependent protease La (LON) substrate-binding domain / Found in ATP-dependent protease La (LON) / RSE1/DDB1/CPSF1 second beta-propeller / Cleavage/polyadenylation specificity factor, A subunit, C-terminal / Cleavage/polyadenylation specificity factor, A subunit, N-terminal / : / CPSF A subunit region / RSE1/DDB1/CPSF1 first beta-propeller / PUA-like superfamily / Bromodomain protein 4, C-terminal / C-terminal domain of bromodomain protein 4 / Brdt, bromodomain, repeat I / Brdt, bromodomain, repeat II / NET domain superfamily / NET domain profile. / : / NET domain / Bromodomain extra-terminal - transcription regulation / Bromodomain, conserved site / Bromodomain signature. / Bromodomain / bromo domain / Bromodomain / Bromodomain (BrD) profile. / Bromodomain-like superfamily / WD40-repeat-containing domain superfamily / WD40/YVTN repeat-like-containing domain superfamily
Similarity search - Domain/homology
Bromodomain-containing protein 4 / DNA damage-binding protein 1 / Protein cereblon
Similarity search - Component
Biological speciesHomo sapiens (human)
Methodsingle particle reconstruction / cryo EM / Resolution: 2.66 Å
AuthorsFischer G / Peter D / Arce-Solano S / Kessler D
Funding support1 items
OrganizationGrant numberCountry
Not funded
CitationJournal: J Am Chem Soc / Year: 2025
Title: Enzyme-Activated Sugar-Coated Bifunctional Degraders.
Authors: Qian Zhu / Gerhard Fischer / Steven S Cheng / N Connor Payne / Daniel Peter / Alison C Mody / Silvia Arce-Solano / Dacheng Shen / Zhi Lin / Ralph Mazitschek / Dirk Kessler / Christina M Woo /
Abstract: Targeted protein degradation with compounds like proteolysis targeting chimeras (PROTACs) directs disease-associated proteins to the E3 ligase ubiquitin-proteasome system for removal. However, ...Targeted protein degradation with compounds like proteolysis targeting chimeras (PROTACs) directs disease-associated proteins to the E3 ligase ubiquitin-proteasome system for removal. However, commonly employed E3 ligases such as cereblon (CRBN) are broadly expressed. To metabolically gate PROTAC activity, we developed an enzymatic activation strategy by integrating an O-GlcNAc modification to the cyclimids, ligands derived from the natural motifs recognized by CRBN. These sugar-coated PROTACs (SCPs) were designed using structural analyses of representative cyclimid degraders complexed with CRBN and target protein BRD4. We found that glycosylation of the cyclimid reduced CRBN binding and complex formation with BRD4 until enzymatic removal of the O-GlcNAc moiety by O-GlcNAcase (OGA). The requirement for enzymatic activation is demonstrated by biochemical binding, cellular degradation, and cell viability assays in engineered and native cell lines. O-GlcNAc is thus an effective mechanism to gate targeted protein degradation modalities that motivates the development of similar strategies to enhance selectivity with other protein modifications.
History
DepositionAug 7, 2025-
Header (metadata) releaseOct 29, 2025-
Map releaseOct 29, 2025-
UpdateOct 29, 2025-
Current statusOct 29, 2025Processing site: PDBe / Status: Released

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Structure visualization

Supplemental images

emd_54691.png

Downloads & links

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Map

FileDownload / File: emd_54691.map.gz / Format: CCP4 / Size: 216 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
Annotationcomposite map
Projections & slices

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AxesX (Sec.)Y (Row.)Z (Col.)
0.75 Å/pix.
x 384 pix.
= 287.616 Å		0.75 Å/pix.
x 384 pix.
= 287.616 Å		0.75 Å/pix.
x 384 pix.
= 287.616 Å

Surface

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Images are generated by Spider.

Voxel sizeX=Y=Z: 0.749 Å
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Histogram (log scale)
Contour LevelBy AUTHOR: 10.0
Minimum - Maximum-50.598469999999999 - 63.123750000000001
Average (Standard dev.)0.008577075 (±1.197289)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderZYX
Origin000
Dimensions384384384
Spacing384384384
CellA=B=C: 287.616 Å
α=β=γ: 90.0 °

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Supplemental data

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Additional map: focussed map

Fileemd_54691_additional_1.map
Annotationfocussed map
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Additional map: full non-focussed map

Fileemd_54691_additional_2.map
Annotationfull non-focussed map
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Half map: half map A of full non-focussed map

Fileemd_54691_half_map_1.map
Annotationhalf map A of full non-focussed map
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Half map: half map B of full non-focussed map

Fileemd_54691_half_map_2.map
Annotationhalf map B of full non-focussed map
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Sample components

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Entire : Ternary PROTAC-mediated complex consisting of Cereblon, DDB1 and ...

EntireName: Ternary PROTAC-mediated complex consisting of Cereblon, DDB1 and BRD4-BD1, non-covalently linked by JQ1-AcN
Components
  • Complex: Ternary PROTAC-mediated complex consisting of Cereblon, DDB1 and BRD4-BD1, non-covalently linked by JQ1-AcN
    • Protein or peptide: Protein cereblon
    • Protein or peptide: DNA damage-binding protein 1
    • Protein or peptide: Bromodomain-containing protein 4
  • Ligand: ZINC ION
  • Ligand: N-[(2S)-1-[[(3S)-2,5-bis(oxidanylidene)pyrrolidin-3-yl]amino]-1-oxidanylidene-propan-2-yl]-9-[2-[(9S)-7-(4-chlorophenyl)-4,5,13-trimethyl-3-thia-1,8,11,12-tetrazatricyclo[8.3.0.0^{2,6}]trideca-2(6),4,7,10,12-pentaen-9-yl]ethanoylamino]nonanamide

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Supramolecule #1: Ternary PROTAC-mediated complex consisting of Cereblon, DDB1 and ...

SupramoleculeName: Ternary PROTAC-mediated complex consisting of Cereblon, DDB1 and BRD4-BD1, non-covalently linked by JQ1-AcN
type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1-#3
Source (natural)Organism: Homo sapiens (human)

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Macromolecule #1: Protein cereblon

MacromoleculeName: Protein cereblon / type: protein_or_peptide / ID: 1 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 50.559559 KDa
Recombinant expressionOrganism: unidentified baculovirus
SequenceString: SAGEGDQQDA AHNMGNHLPL LPAESEEEDE MEVEDQDSKE AKKPNIINFD TSLPTSHTYL GADMEEFHGR TLHDDDSCQV IPVLPQVMM ILIPGQTLPL QLFHPQEVSM VRNLIQKDRT FAVLAYSNVQ EREAQFGTTA EIYAYREEQD FGIEIVKVKA I GRQRFKVL ...String:
SAGEGDQQDA AHNMGNHLPL LPAESEEEDE MEVEDQDSKE AKKPNIINFD TSLPTSHTYL GADMEEFHGR TLHDDDSCQV IPVLPQVMM ILIPGQTLPL QLFHPQEVSM VRNLIQKDRT FAVLAYSNVQ EREAQFGTTA EIYAYREEQD FGIEIVKVKA I GRQRFKVL ELRTQSDGIQ QAKVQILPEC VLPSTMSAVQ LESLNKCQIF PSKPVSREDQ CSYKWWQKYQ KRKFHCANLT SW PRWLYSL YDAETLMDRI KKQLREWDEN LKDDSLPSNP IDFSYRVAAC LPIDDVLRIQ LLKIGSAIQR LRCELDIMNK CTS LCCKQC QETEITTKNE IFSLSLCGPM AAYVNPHGYV HETLTVYKAC NLNLIGRPST EHSWFPGYAW TVAQCKICAS HIGW KFTAT KKDMSPQKFW GLTRSALLPT IPDTEDEISP DKVILCL

UniProtKB: Protein cereblon

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Macromolecule #2: DNA damage-binding protein 1

MacromoleculeName: DNA damage-binding protein 1 / type: protein_or_peptide / ID: 2
Details: beta-propeller B removed,beta-propeller B removed,beta-propeller B removed,beta-propeller B removed,beta-propeller B removed,beta-propeller B removed,beta-propeller B removed,beta-propeller B removed
Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 93.347078 KDa
Recombinant expressionOrganism: unidentified baculovirus
SequenceString: MSYNYVVTAQ KPTAVNGCVT GHFTSAEDLN LLIAKNTRLE IYVVTAEGLR PVKEVGMYGK IAVMELFRPK GESKDLLFIL TAKYNACIL EYKQSGESID IITRAHGNVQ DRIGRPSETG IIGIIDPECR MIGLRLYDGL FKVIPLDRDN KELKAFNIRL E ELHVIDVK ...String:
MSYNYVVTAQ KPTAVNGCVT GHFTSAEDLN LLIAKNTRLE IYVVTAEGLR PVKEVGMYGK IAVMELFRPK GESKDLLFIL TAKYNACIL EYKQSGESID IITRAHGNVQ DRIGRPSETG IIGIIDPECR MIGLRLYDGL FKVIPLDRDN KELKAFNIRL E ELHVIDVK FLYGCQAPTI CFVYQDPQGR HVKTYEVSLR EKEFNKGPWK QENVEAEASM VIAVPEPFGG AIIIGQESIT YH NGDKYLA IAPPIIKQST IVCHNRVDPN GSRYLLGDME GRLFMLLLEK EEQMDGTVTL KDLRVELLGE TSIAECLTYL DNG VVFVGS RLGDSQLVKL NVDSNEQGSY VVAMETFTNL GPIVDMCVVD LERQGQGQLV TCSGAFKEGS LRIIRNGIGG NGNS GEIQK LHIRTVPLYE SPRKICYQEV SQCFGVLSSR IEVQDTSGGT TALRPSASTQ ALSSSVSSSK LFSSSTAPHE TSFGE EVEV HNLLIIDQHT FEVLHAHQFL QNEYALSLVS CKLGKDPNTY FIVGTAMVYP EEAEPKQGRI VVFQYSDGKL QTVAEK EVK GAVYSMVEFN GKLLASINST VRLYEWTTEK ELRTECNHYN NIMALYLKTK GDFILVGDLM RSVLLLAYKP MEGNFEE IA RDFNPNWMSA VEILDDDNFL GAENAFNLFV CQKDSAATTD EERQHLQEVG LFHLGEFVNV FCHGSLVMQN LGETSTPT Q GSVLFGTVNG MIGLVTSLSE SWYNLLLDMQ NRLNKVIKSV GKIEHSFWRS FHTERKTEPA TGFIDGDLIE SFLDISRPK MQEVVANLQY DDGSGMKREA TADDLIKVVE ELTRIH

UniProtKB: DNA damage-binding protein 1, DNA damage-binding protein 1

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Macromolecule #3: Bromodomain-containing protein 4

MacromoleculeName: Bromodomain-containing protein 4 / type: protein_or_peptide / ID: 3 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 15.09938 KDa
Recombinant expressionOrganism: Escherichia coli (E. coli)
SequenceString:
SMNPPPPETS NPNKPKRQTN QLQYLLRVVL KTLWKHQFAW PFQQPVDAVK LNLPDYYKII KTPMDMGTIK KRLENNYYWN AQECIQDFN TMFTNCYIYN KPGDDIVLMA EALEKLFLQK INELPTEE

UniProtKB: Bromodomain-containing protein 4

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Macromolecule #4: ZINC ION

MacromoleculeName: ZINC ION / type: ligand / ID: 4 / Number of copies: 1 / Formula: ZN
Molecular weightTheoretical: 65.409 Da

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Macromolecule #5: N-[(2S)-1-[[(3S)-2,5-bis(oxidanylidene)pyrrolidin-3-yl]amino]-1-o...

MacromoleculeName: N-[(2S)-1-[[(3S)-2,5-bis(oxidanylidene)pyrrolidin-3-yl]amino]-1-oxidanylidene-propan-2-yl]-9-[2-[(9S)-7-(4-chlorophenyl)-4,5,13-trimethyl-3-thia-1,8,11,12-tetrazatricyclo[8.3.0.0^{2,6}]trideca- ...Name: N-[(2S)-1-[[(3S)-2,5-bis(oxidanylidene)pyrrolidin-3-yl]amino]-1-oxidanylidene-propan-2-yl]-9-[2-[(9S)-7-(4-chlorophenyl)-4,5,13-trimethyl-3-thia-1,8,11,12-tetrazatricyclo[8.3.0.0^{2,6}]trideca-2(6),4,7,10,12-pentaen-9-yl]ethanoylamino]nonanamide
type: ligand / ID: 5 / Number of copies: 1 / Formula: A1JM3
Molecular weightTheoretical: 723.285 Da

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Experimental details

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Structure determination

Methodcryo EM
Processingsingle particle reconstruction
Aggregation stateparticle

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Sample preparation

Concentration0.3 mg/mL
BufferpH: 7.5
Component:
ConcentrationName
20.0 mMHEPES
100.0 mMNaCl
0.25 mMTCEP

Details: 20 mM HEPES, 100 mM NaCl, 0.25 mM TCEP, pH: 7.5
GridModel: UltrAuFoil R1.2/1.3 / Material: GOLD / Mesh: 300 / Support film - Material: GOLD / Support film - topology: HOLEY / Pretreatment - Type: GLOW DISCHARGE / Pretreatment - Time: 30 sec. / Details: QF-1.2/1.3-3C AuFoil
VitrificationCryogen name: ETHANE / Chamber humidity: 95 % / Chamber temperature: 277 K / Instrument: FEI VITROBOT MARK IV
Detailscomplex purified via size exclusion chromatography

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Electron microscopy

MicroscopeTFS KRIOS
Specialist opticsEnergy filter - Name: TFS Selectris X / Energy filter - Slit width: 10 eV
Image recordingFilm or detector model: TFS FALCON 4i (4k x 4k) / Number grids imaged: 3 / Number real images: 21670 / Average electron dose: 40.0 e/Å2
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Nominal defocus max: 2.0 µm / Nominal defocus min: 0.8 µm / Nominal magnification: 165000
Sample stageSpecimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER / Cooling holder cryogen: NITROGEN
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

CTF correctionSoftware - Name: cryoSPARC / Type: PHASE FLIPPING AND AMPLITUDE CORRECTION
Startup modelType of model: NONE / Details: ab-initio reconstruction (cryoSPARC)
Final reconstructionResolution.type: BY AUTHOR / Resolution: 2.66 Å / Resolution method: FSC 0.143 CUT-OFF / Software - Name: cryoSPARC / Number images used: 184507
Initial angle assignmentType: MAXIMUM LIKELIHOOD
Final angle assignmentType: MAXIMUM LIKELIHOOD
FSC plot (resolution estimation)

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Atomic model buiding 1

Initial model
PDB IDChain

3mxf

chain_id: A, source_name: PDB, initial_model_type: experimental model

5fqd

chain_id: A, source_name: PDB, initial_model_type: experimental model

5fqd

chain_id: B, source_name: PDB, initial_model_type: experimental model
RefinementSpace: REAL / Protocol: FLEXIBLE FIT / Overall B value: 94
Output model

PDB-9sai:
Ternary PROTAC-mediated complex consisting of Cereblon, DDB1 and BRD4-BD1, non-covalently linked by JQ1-AcN

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