2026-04-08 REL RCSB INITIAL_RELEASE REPOSITORY INITIAL_RELEASE REPOSITORY INITIAL_RELEASE REPOSITORY INITIAL_RELEASE REPOSITORY INITIAL_RELEASE REPOSITORY INITIAL_RELEASE REPOSITORY INITIAL_RELEASE REPOSITORY INITIAL_RELEASE REPOSITORY INITIAL_RELEASE REPOSITORY RCSB RCSB 2026-03-05 2026-04-08 2026-04-08 2026-04-08 National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS) 5R35GM138206 United States National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS) 1S10OD032471 United States Other private Searle Scholars United States Other private Cottrell Scholars United States Other private George W. and Carol A. Lattimer Faculty Research Fellowship United States Influenza A virus Hemagglutinin (A/Darwin/6/2021 H3N2) (C3 symmetry) determined using the SPT Labtech chameleon in the presence of 0x SurfACT Enos SE Cook BD Rahmani H Narehood SM Li Y Kuschnerus IC Redford HT Dukakis P Ji D Bachochin MJ Grotjahn DA Herzik MA Hemagglutinin, Influenza A virus, H3N2, Viral Entry, Trimer, Glycoprotein, Membrane Fusion, VIRAL PROTEIN Enos SE Cook BD Rahmani H Narehood SM Li Y Kuschnerus IC Redford TH Dukakis P Ji D Bachochin MJ Grotjahn DA Herzik MA A Surfactant Cocktail Overcomes Air-Water Interface Artifacts in Single-Particle CryoEM. Biorxiv US 2026 41889805 doi:10.64898/2026.03.17.712260 2692-8205 EMDB EMD-75843 associated EM volume Influenza A virus Hemagglutinin (A/Darwin/6/2021 H3N2) (C3 symmetry) determined using the SPT Labtech chameleon in the presence of 0x SurfACT Influenza A virus Hemagglutinin (A/Darwin/6/2021 H3N2) (C3 symmetry) determined using the SPT Labtech chameleon in the presence of 0x SurfACT 0 1 Influenza A virus 0.185 Hemagglutinin Influenza A virus Homo sapiens LEVO MKTIIALSNILCLVFAQKIPGNDNSTATLCLGHHAVPNGTIVKTITNDRIEVTNATELVQNSSIGEICGSPHQILDGGNCTLIDALLGDPQCDGFQNKEWDLFVERSRANSNCYPYDVPDYASLRSLVASSGTLEFKNESFNWTGVKQNGTSSACIRGSSSSFFSRLNWLTSLNNIYPAQNVTMPNKEQFDKLYIWGVHHPDTDKNQISLFAQSSGRITVSTKRSQQAVIPNIGSRPRIRDIPSRISIYWTIVKPGDILLINSTGNLIAPRGYFKIRSGKSSIMRSDAPIGKCKSECITPNGSIPNDKPFQNVNRITYGACPRYVKQSTLKLATGMRNVPEKQTRGIFGAIAGFIENGWEGMVDGWYGFRHQNSEGRGQAADLKSTQAAIDQINGKLNRLIGKTNEKFHQIEKEFSEVEGRVQDLEKYVEDTKIDLWSYNAELLVALENQHTIDLTDSEMNKLFEKTKKQLRENAEDMGNGCFKIYHKCDNACIGSIRNETYDHNVYRDEALNNRFQIKGVgyipeaprdgqayvrkdgewvllstflgsenlyfqggshhhhhh singleParticle particle 2 7.6 50.0 NH2C(CH2OH)3-HCl TRIS HCl 150.0 NaCl Sodium Chloride Quantifoil Active R1.2/0.8 COPPER CARBON HOLEY GLOW DISCHARGE ETHANE 75 298.15 SPT LABTECH CHAMELEON
Samples were frozen with the SPT Labtech chameleon.
TFS KRIOS FLOOD BEAM BRIGHT FIELD FIELD EMISSION GUN 300 2.7 1.0 2.5 165000.0 FEI TITAN KRIOS AUTOGRID HOLDER NITROGEN TFS Selectris X 10 TFS FALCON 4i (4k x 4k) 4096 4096 1 495 5.0 65.0 1 cryoSPARC 4.7.1 PHASE FLIPPING AND AMPLITUDE CORRECTION
Ab-Initio Reconstruction
 C3 FOURIER SPACE 2.65 FSC 0.143 CUT-OFF cryoSPARC 4.7.1 94355 MAXIMUM LIKELIHOOD cryoSPARC 4.7.1 MAXIMUM LIKELIHOOD cryoSPARC 4.7.1 emd_75843.map.gz 1 IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) 448 448 448 0 0 0 448 448 448 329.28 329.28 329.28 90.0 90.0 90.0 X Y Z -0.14846972 0.22969364 -0.000001782075 0.0033467712 0.735 0.735 0.735 0.0261 AUTHOR Influenza A virus Hemagglutinin (A/Darwin/6/2021 H3N2) (C3 symmetry) determined using the SPT Labtech chameleon in the presence of 0x SurfACT Other experimental model
ModelAngelo
 RIGID BODY FIT REAL 68.400000000000006 emd_75843_msk_1.map emd_75843_additional_1.map.gz 1 IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) 448 448 448 0 0 0 448 448 448 329.28 329.28 329.28 90.0 90.0 90.0 X Y Z -0.048041817 0.091686286 -0.0000017820743 0.0015820538 0.735 0.735 0.735 AUTHOR Unsharpened map of Influenza A virus Hemagglutinin (A/Darwin/6/2021 H3N2) (C3 symmetry) determined using the SPT Labtech chameleon in the presence of 0x SurfACT emd_75843_additional_2.map.gz 1 IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) 164 106 108 140 169 173 108 106 164 79.380005 77.91 120.54 90.0 90.0 90.0 Z Y X -5.6121907 7.8842854 0.000000000007741 0.49444035 0.7350001 0.735 0.735 AUTHOR Phenix RESOLVE modified EM map of Influenza A virus Hemagglutinin (A/Darwin/6/2021 H3N2) (C3 symmetry) determined using the SPT Labtech chameleon in the presence of 0x SurfACT emd_75843_half_map_1.map.gz 1 IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) 448 448 448 0 0 0 448 448 448 329.28 329.28 329.28 90.0 90.0 90.0 X Y Z -0.070993565 0.12051213 0.000019548928 0.0050308784 0.735 0.735 0.735 AUTHOR Half map A of Influenza A virus Hemagglutinin (A/Darwin/6/2021 H3N2) determined using the SPT Labtech chameleon in the presence of 0x SurfACT; C3 symmetry emd_75843_half_map_2.map.gz 1 IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) 448 448 448 0 0 0 448 448 448 329.28 329.28 329.28 90.0 90.0 90.0 X Y Z -0.058803912 0.11474082 0.000019585546 0.0050238143 0.735 0.735 0.735 AUTHOR Half map B of Influenza A virus Hemagglutinin (A/Darwin/6/2021 H3N2) determined using the SPT Labtech chameleon in the presence of 0x SurfACT; C3 symmetry