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- EMDB-61444: Cryo-EM structure of Neuropeptide FF receptor 2 in complex with h... -

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Entry
Database: EMDB / ID: EMD-61444
TitleCryo-EM structure of Neuropeptide FF receptor 2 in complex with hNPSF and Gi
Map data
Sample
  • Complex: Human Neuropeptide FF receptor 2 in Complex with Neuropeptide SF and G Protein
    • Protein or peptide: Isoform 2 of Neuropeptide FF receptor 2
    • Protein or peptide: Neuropeptide SF
    • Protein or peptide: Guanine nucleotide-binding protein G(i) subunit alpha-1
    • Protein or peptide: Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1
    • Protein or peptide: Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2
    • Protein or peptide: single-chain antibody Fv fragment (scFv16)
KeywordsGPCR / G-protein / neuropeptide / MEMBRANE PROTEIN
Function / homology
Function and homology information


neuropeptide activity / opioid receptor binding / Orexin and neuropeptides FF and QRFP bind to their respective receptors / detection of abiotic stimulus / neuropeptide receptor activity / neuropeptide hormone activity / regulation of MAPK cascade / neuropeptide signaling pathway / Adenylate cyclase inhibitory pathway / positive regulation of protein localization to cell cortex ...neuropeptide activity / opioid receptor binding / Orexin and neuropeptides FF and QRFP bind to their respective receptors / detection of abiotic stimulus / neuropeptide receptor activity / neuropeptide hormone activity / regulation of MAPK cascade / neuropeptide signaling pathway / Adenylate cyclase inhibitory pathway / positive regulation of protein localization to cell cortex / T cell migration / cellular response to hormone stimulus / D2 dopamine receptor binding / response to prostaglandin E / G protein-coupled serotonin receptor binding / adenylate cyclase-inhibiting serotonin receptor signaling pathway / adenylate cyclase regulator activity / axon terminus / cellular response to forskolin / regulation of mitotic spindle organization / excitatory postsynaptic potential / Regulation of insulin secretion / G protein-coupled receptor binding / positive regulation of cholesterol biosynthetic process / G protein-coupled receptor activity / adenylate cyclase-inhibiting G protein-coupled receptor signaling pathway / adenylate cyclase-modulating G protein-coupled receptor signaling pathway / G-protein beta/gamma-subunit complex binding / response to peptide hormone / Olfactory Signaling Pathway / Activation of the phototransduction cascade / G beta:gamma signalling through PLC beta / Presynaptic function of Kainate receptors / Thromboxane signalling through TP receptor / G protein-coupled acetylcholine receptor signaling pathway / G-protein activation / Activation of G protein gated Potassium channels / Inhibition of voltage gated Ca2+ channels via Gbeta/gamma subunits / Prostacyclin signalling through prostacyclin receptor / G beta:gamma signalling through CDC42 / Glucagon signaling in metabolic regulation / G beta:gamma signalling through BTK / Synthesis, secretion, and inactivation of Glucagon-like Peptide-1 (GLP-1) / ADP signalling through P2Y purinoceptor 12 / Sensory perception of sweet, bitter, and umami (glutamate) taste / photoreceptor disc membrane / Glucagon-type ligand receptors / Adrenaline,noradrenaline inhibits insulin secretion / Vasopressin regulates renal water homeostasis via Aquaporins / G alpha (z) signalling events / Glucagon-like Peptide-1 (GLP1) regulates insulin secretion / GDP binding / ADORA2B mediated anti-inflammatory cytokines production / cellular response to catecholamine stimulus / ADP signalling through P2Y purinoceptor 1 / G beta:gamma signalling through PI3Kgamma / adenylate cyclase-activating dopamine receptor signaling pathway / Cooperation of PDCL (PhLP1) and TRiC/CCT in G-protein beta folding / actin cytoskeleton / GPER1 signaling / Inactivation, recovery and regulation of the phototransduction cascade / cellular response to prostaglandin E stimulus / G-protein beta-subunit binding / heterotrimeric G-protein complex / G alpha (12/13) signalling events / sensory perception of taste / extracellular vesicle / signaling receptor complex adaptor activity / Thrombin signalling through proteinase activated receptors (PARs) / G protein activity / GTPase binding / Ca2+ pathway / retina development in camera-type eye / cell cortex / midbody / High laminar flow shear stress activates signaling by PIEZO1 and PECAM1:CDH5:KDR in endothelial cells / fibroblast proliferation / phospholipase C-activating G protein-coupled receptor signaling pathway / G alpha (i) signalling events / Hydrolases; Acting on acid anhydrides; Acting on GTP to facilitate cellular and subcellular movement / G alpha (s) signalling events / chemical synaptic transmission / G alpha (q) signalling events / perikaryon / Ras protein signal transduction / Extra-nuclear estrogen signaling / cell population proliferation / postsynapse / G protein-coupled receptor signaling pathway / lysosomal membrane / signaling receptor binding / cell division / GTPase activity / centrosome / dendrite / synapse / protein-containing complex binding / nucleolus / GTP binding / magnesium ion binding
Similarity search - Function
Pro-FMRFamide-related neuropeptide FF / Neuropeptide FF / Neuropeptide FF receptor family / Neuropeptide FF receptor, type 2 / G-protein alpha subunit, group I / Serpentine type 7TM GPCR chemoreceptor Srsx / Guanine nucleotide binding protein (G-protein), alpha subunit / G protein alpha subunit, helical insertion / G-protein alpha subunit / G-alpha domain profile. ...Pro-FMRFamide-related neuropeptide FF / Neuropeptide FF / Neuropeptide FF receptor family / Neuropeptide FF receptor, type 2 / G-protein alpha subunit, group I / Serpentine type 7TM GPCR chemoreceptor Srsx / Guanine nucleotide binding protein (G-protein), alpha subunit / G protein alpha subunit, helical insertion / G-protein alpha subunit / G-alpha domain profile. / G protein alpha subunit / G-protein, gamma subunit / G-protein gamma subunit domain profile. / G-protein gamma-like domain / G-protein gamma-like domain superfamily / GGL domain / G protein gamma subunit-like motifs / GGL domain / Guanine nucleotide-binding protein, beta subunit / G-protein, beta subunit / G-protein coupled receptors family 1 signature. / G protein-coupled receptor, rhodopsin-like / GPCR, rhodopsin-like, 7TM / G-protein coupled receptors family 1 profile. / 7 transmembrane receptor (rhodopsin family) / G-protein beta WD-40 repeat / WD40 repeat, conserved site / Trp-Asp (WD) repeats signature. / Trp-Asp (WD) repeats profile. / Trp-Asp (WD) repeats circular profile. / WD domain, G-beta repeat / WD40 repeats / WD40 repeat / WD40-repeat-containing domain superfamily / WD40/YVTN repeat-like-containing domain superfamily / P-loop containing nucleoside triphosphate hydrolase
Similarity search - Domain/homology
Pro-FMRFamide-related neuropeptide FF / Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2 / Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1 / Guanine nucleotide-binding protein G(i) subunit alpha-1 / Neuropeptide FF receptor 2
Similarity search - Component
Biological speciesHomo sapiens (human) / Mus musculus (house mouse)
Methodsingle particle reconstruction / cryo EM / Resolution: 3.21 Å
AuthorsKim J / Choi H-J
Funding support Korea, Republic Of, 1 items
OrganizationGrant numberCountry
National Research Foundation (NRF, Korea) Korea, Republic Of
CitationJournal: EMBO Rep / Year: 2025
Title: Structural insights into the selective recognition of RF-amide peptides by neuropeptide FF receptor 2.
Authors: Jeesoo Kim / Sooyoung Hong / Hajin Lee / Hyun Sik Lee / Chaehee Park / Jinuk Kim / Wonpil Im / Hee-Jung Choi /
Abstract: Neuropeptide FF Receptor 2 (NPFFR2), a G-protein-coupled receptor, plays a role in pain modulation and diet-induced thermogenesis. While NPFFR2 is strongly activated by neuropeptides FF (NPFFs), it ...Neuropeptide FF Receptor 2 (NPFFR2), a G-protein-coupled receptor, plays a role in pain modulation and diet-induced thermogenesis. While NPFFR2 is strongly activated by neuropeptides FF (NPFFs), it shows low activity in response to RF-amide-related peptides (RFRPs), despite the peptides belonging to a shared family. In contrast, NPFFR1, which shares high sequence similarity with NPFFR2, is activated by RFRPs and regulates reproductive hormone balance. The molecular basis for these receptor-specific interactions with their RF-amide peptides remains unclear. Here, we present cryo-electron microscopy structures of NPFFR2 in its active state bound to the agonist RF-amide peptide hNPSF, and in its ligand-free state. Structural analysis reveals that the C-terminal RF-amide moiety engages conserved residues in the transmembrane domain, while the N-terminal segment interacts in a receptor subtype-specific manner. Key selectivity-determining residues in NPFFR2 are also identified. A homology model of NPFFR1 bound to RFRP, supported by mutagenesis studies, further validates this selectivity mechanism. Additionally, structural comparison between the inactive and active states of NPFFR2 suggests a TM3-mediated activation mechanism. These findings provide insights into RF-amide peptide recognition by NPFF receptors.
History
DepositionSep 5, 2024-
Header (metadata) releaseApr 9, 2025-
Map releaseApr 9, 2025-
UpdateApr 9, 2025-
Current statusApr 9, 2025Processing site: PDBj / Status: Released

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Structure visualization

Supplemental images

emd_61444.png

Downloads & links

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Map

FileDownload / File: emd_61444.map.gz / Format: CCP4 / Size: 103 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
Projections & slices

Image control

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AxesZ (Sec.)Y (Row.)X (Col.)
1.05 Å/pix.
x 300 pix.
= 315. Å		1.05 Å/pix.
x 300 pix.
= 315. Å		1.05 Å/pix.
x 300 pix.
= 315. Å

Surface

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Images are generated by Spider.

Voxel sizeX=Y=Z: 1.05 Å
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Histogram (log scale)
Contour LevelBy AUTHOR: 0.16
Minimum - Maximum-1.8064195 - 3.0425322
Average (Standard dev.)-0.00046905386 (±0.036324795)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions300300300
Spacing300300300
CellA=B=C: 315.0 Å
α=β=γ: 90.0 °

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Supplemental data

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Additional map: A composite map was made by applying separate...

Fileemd_61444_additional_1.map
AnnotationA composite map was made by applying separate masks for local refinement of the GPCR and G protein, then merging them using vop maximum.
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Half map: #2

Fileemd_61444_half_map_1.map
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Half map: #1

Fileemd_61444_half_map_2.map
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Sample components

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Entire : Human Neuropeptide FF receptor 2 in Complex with Neuropeptide SF ...

EntireName: Human Neuropeptide FF receptor 2 in Complex with Neuropeptide SF and G Protein
Components
  • Complex: Human Neuropeptide FF receptor 2 in Complex with Neuropeptide SF and G Protein
    • Protein or peptide: Isoform 2 of Neuropeptide FF receptor 2
    • Protein or peptide: Neuropeptide SF
    • Protein or peptide: Guanine nucleotide-binding protein G(i) subunit alpha-1
    • Protein or peptide: Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1
    • Protein or peptide: Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2
    • Protein or peptide: single-chain antibody Fv fragment (scFv16)

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Supramolecule #1: Human Neuropeptide FF receptor 2 in Complex with Neuropeptide SF ...

SupramoleculeName: Human Neuropeptide FF receptor 2 in Complex with Neuropeptide SF and G Protein
type: complex / ID: 1 / Parent: 0 / Macromolecule list: all
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 160 KDa

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Macromolecule #1: Isoform 2 of Neuropeptide FF receptor 2

MacromoleculeName: Isoform 2 of Neuropeptide FF receptor 2 / type: protein_or_peptide / ID: 1 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 49.709082 KDa
Recombinant expressionOrganism: Spodoptera frugiperda (fall armyworm)
SequenceString: DYKDDDDASS ENWHPIWNVN DTKHHLYSDI NITYVNYYLH QPQVAAIFII SYFLIFFLCM MGNTVVCFIV MRNKHMHTVT NLFILNLAI SDLLVGIFCM PITLLDNIIA GWPFGNTMCK ISGLVQGISV AASVFTLVAI AVDRFQCVVY PFKPKLTIKT A FVIIMIIW ...String:
DYKDDDDASS ENWHPIWNVN DTKHHLYSDI NITYVNYYLH QPQVAAIFII SYFLIFFLCM MGNTVVCFIV MRNKHMHTVT NLFILNLAI SDLLVGIFCM PITLLDNIIA GWPFGNTMCK ISGLVQGISV AASVFTLVAI AVDRFQCVVY PFKPKLTIKT A FVIIMIIW VLAITIMSPS AVMLHVQEEK YYRVRLNSQN KTSPVYWCRE DWPNQEMRKI YTTVLFANIY LAPLSLIVIM YG RIGISLF RAAVPHTGRK NQEQWHVVSR KKQKIIKMLL IVALLFILSW LPLWTLMMLS DYADLSPNEL QIINIYIYPF AHW LAFGNS SVNPIIYGFF NENFRRGFQE AFQLQLCQKR AKPMEAYALK AKSHVLINTS NQLVQESTFQ NPHGETLLYR KSAE KPQQE LVMEELKETT NSSEIHMGLE VLFQ

UniProtKB: Neuropeptide FF receptor 2

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Macromolecule #2: Neuropeptide SF

MacromoleculeName: Neuropeptide SF / type: protein_or_peptide / ID: 2 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 1.367553 KDa
SequenceString:
SQAFLFQPQR F(NH2)

UniProtKB: Pro-FMRFamide-related neuropeptide FF

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Macromolecule #3: Guanine nucleotide-binding protein G(i) subunit alpha-1

MacromoleculeName: Guanine nucleotide-binding protein G(i) subunit alpha-1
type: protein_or_peptide / ID: 3 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 40.415031 KDa
Recombinant expressionOrganism: Spodoptera frugiperda (fall armyworm)
SequenceString: MGCTLSAEDK AAVERSKMID RNLREDGEKA AREVKLLLLG AGESGKSTIV KQMKIIHEAG YSEEECKQYK AVVYSNTIQS IIAIIRAMG RLKIDFGDSA RADDARQLFV LAGAAEEGFM TAELAGVIKR LWKDSGVQAC FNRSREYQLN DSAAYYLNDL D RIAQPNYI ...String:
MGCTLSAEDK AAVERSKMID RNLREDGEKA AREVKLLLLG AGESGKSTIV KQMKIIHEAG YSEEECKQYK AVVYSNTIQS IIAIIRAMG RLKIDFGDSA RADDARQLFV LAGAAEEGFM TAELAGVIKR LWKDSGVQAC FNRSREYQLN DSAAYYLNDL D RIAQPNYI PTQQDVLRTR VKTTGIVETH FTFKDLHFKM FDVGGQRSER KKWIHCFEGV TAIIFCVALS DYDLVLAEDE EM NRMHESM KLFDSICNNK WFTDTSIILF LNKKDLFEEK IKKSPLTICY PEYAGSNTYE EAAAYIQCQF EDLNKRKDTK EIY THFTCA TDTKNVQFVF DAVTDVIIKN NLKDCGLF

UniProtKB: Guanine nucleotide-binding protein G(i) subunit alpha-1

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Macromolecule #4: Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1

MacromoleculeName: Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1
type: protein_or_peptide / ID: 4 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 37.728152 KDa
Recombinant expressionOrganism: Spodoptera frugiperda (fall armyworm)
SequenceString: GPGSSGSELD QLRQEAEQLK NQIRDARKAC ADATLSQITN NIDPVGRIQM RTRRTLRGHL AKIYAMHWGT DSRLLVSASQ DGKLIIWDS YTTNKVHAIP LRSSWVMTCA YAPSGNYVAC GGLDNICSIY NLKTREGNVR VSRELAGHTG YLSCCRFLDD N QIVTSSGD ...String:
GPGSSGSELD QLRQEAEQLK NQIRDARKAC ADATLSQITN NIDPVGRIQM RTRRTLRGHL AKIYAMHWGT DSRLLVSASQ DGKLIIWDS YTTNKVHAIP LRSSWVMTCA YAPSGNYVAC GGLDNICSIY NLKTREGNVR VSRELAGHTG YLSCCRFLDD N QIVTSSGD TTCALWDIET GQQTTTFTGH TGDVMSLSLA PDTRLFVSGA CDASAKLWDV REGMCRQTFT GHESDINAIC FF PNGNAFA TGSDDATCRL FDLRADQELM TYSHDNIICG ITSVSFSKSG RLLLAGYDDF NCNVWDALKA DRAGVLAGHD NRV SCLGVT DDGMAVATGS WDSFLKIWN

UniProtKB: Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1

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Macromolecule #5: Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2

MacromoleculeName: Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2
type: protein_or_peptide / ID: 5 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 7.861143 KDa
Recombinant expressionOrganism: Spodoptera frugiperda (fall armyworm)
SequenceString:
MASNNTASIA QARKLVEQLK MEANIDRIKV SKAAADLMAY CEAHAKEDPL LTPVPASENP FREKKFFCAI L

UniProtKB: Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2

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Macromolecule #6: single-chain antibody Fv fragment (scFv16)

MacromoleculeName: single-chain antibody Fv fragment (scFv16) / type: protein_or_peptide / ID: 6 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Mus musculus (house mouse)
Molecular weightTheoretical: 27.784896 KDa
Recombinant expressionOrganism: Trichoplusia ni (cabbage looper)
SequenceString: DVQLVESGGG LVQPGGSRKL SCSASGFAFS SFGMHWVRQA PEKGLEWVAY ISSGSGTIYY ADTVKGRFTI SRDDPKNTLF LQMTSLRSE DTAMYYCVRS IYYYGSSPFD FWGQGTTLTV SSGGGGSGGG GSGGGGSDIV MTQATSSVPV TPGESVSISC R SSKSLLHS ...String:
DVQLVESGGG LVQPGGSRKL SCSASGFAFS SFGMHWVRQA PEKGLEWVAY ISSGSGTIYY ADTVKGRFTI SRDDPKNTLF LQMTSLRSE DTAMYYCVRS IYYYGSSPFD FWGQGTTLTV SSGGGGSGGG GSGGGGSDIV MTQATSSVPV TPGESVSISC R SSKSLLHS NGNTYLYWFL QRPGQSPQLL IYRMSNLASG VPDRFSGSGS GTAFTLTISR LEAEDVGVYY CMQHLEYPLT FG AGTKLEL KAAAHHHHHH HH

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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

BufferpH: 8
VitrificationCryogen name: ETHANE

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Electron microscopy

MicroscopeTFS KRIOS
Image recordingFilm or detector model: FEI FALCON IV (4k x 4k) / Average electron dose: 45.0 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
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

Startup modelType of model: INSILICO MODEL
Final reconstructionResolution.type: BY AUTHOR / Resolution: 3.21 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 310911
Initial angle assignmentType: MAXIMUM LIKELIHOOD
Final angle assignmentType: MAXIMUM LIKELIHOOD
FSC plot (resolution estimation)

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