Q8N148_Q8NGL4.1 contacts (residues)

ReceptorR: Secondary StructureR: ResidueR; ChainR: Residue numberLigandL: Secondary StructureL: ResidueL: ChainL: Residue Number
RHMETA101LHPHEV236
RHMETA101LHSERV237
RHMETA101LHGLYV240
RHPHEA105LHSERV237
R-THRA11LHLEUV213
RHILEA155LHGLNV233
RHLEUA159LHGLNV233
RHVALA27LHPHEV18
RHVALA27LHGLNV267
RHVALA27LHVALV271
RHPHEA30LHVALV271
RHPHEA30LHLEUV274
RHPHEA30LHVALV275
RHPHEA30LHLEUV279
R-HISA314LHLEUV34
RHLEUA34LHLEUV279
RHLEUA34LHPHEV29
RHLEUA34LHLEUV32
RHTYRA37LHLEUV279
RHTYRA37LHPHEV282
RHTYRA37LHLEUV283
RHTHRA38LHLEUV32
RHVALA41LHPHEV282
RHVALA41LHPHEV286
RHVALA42LHLEUV35
RHLEUA45LHPHEV286
RHARGA52LHGLNV300
RHARGA52LHLYSV307
RHLEUA53LHLYSV307
RHPHEA73LHPHEV286
RHPHEA73LHPHEV290
RHCYSA74LHLYSV296
RHTHRA77LHPHEV286
RHTHRA77LHILEV287
R-GLNA8LHTYRV218
RHPROA81LHILEV248
RHPROA81LHLEUV283
RHPROA81LHILEV287
RHLYSA82LHPHEV247
RHLYSA82LHILEV248
RHLEUA84LHVALV275
RHLEUA84LHLEUV279
RHGLUA85LHPHEV247
RHGLUA85LHILEV248
RHGLUA85LHSERV251
RHGLUA85LHSERV252
RHGLUA85LHVALV275
R-VALA88LHPHEV255
R-VALA88LHVALV268
R-VALA88LHVALV271
R-VALA88LHVALV272
R-VALA88LHVALV275
R-VALA89LHSERV252
R-VALA89LHVALV272
R-GLUA90LHPHEV255
R-GLUA90L-ARGV259
R-GLUA90L-HISV264
R-TYRA91LHSERV251
R-TYRA91LHPHEV255
R-TYRA91L-ARGV259
RSTHRA93LHPHEV247
RSSERA95LHLEUV243
RSSERA95LHPHEV247
RHSERA97LHVALV220
RHSERA97LHLEUV243
RHGLYA98LHLEUV243
RHGLYA98LHPHEV247

 - Title of columns started by 'R:' means Receptor, 'L:' means Ligand
 - In the Secondary Structure columns: 'H' means that residues in that row are part of Alpha Helix; 'S' - Beta Sheet





Q8N148_Q8NGL4.1 contacts (residues & atoms)

ReceptorR: Secondary StructureR: AtomR: ResidueR; ChainR: Residue numberLigandL: Secondary StructureL; AtomL: ResidueL: ChainL: Residue Number
R-NE2GLNA8LHOHTYRV218
R-OG1THRA11LHHD13LEUV213
RHCBVALA27LHHG23VALV271
RHCG1VALA27LHHZPHEV18
RHCG1VALA27LHHE21GLNV267
RHCG1VALA27LHCG2VALV271
RHCG1VALA27LHHG22VALV271
RHCG1VALA27LHHG23VALV271
RHCG2VALA27LHHG3GLNV267
RHCG2VALA27LHCG2VALV271
RHCG2VALA27LHHG13VALV271
RHCG2VALA27LHHG21VALV271
RHCG2VALA27LHHG22VALV271
RHCG2VALA27LHHG23VALV271
RHCGPHEA30LHHG12VALV271
RHCGPHEA30LHCG2VALV275
RHCGPHEA30LHHG21VALV275
RHCGPHEA30LHHG22VALV275
RHCGPHEA30LHHG23VALV275
RHCD1PHEA30LHHG12VALV271
RHCD1PHEA30LHCG2VALV275
RHCD1PHEA30LHHG21VALV275
RHCD1PHEA30LHHG22VALV275
RHCD1PHEA30LHHG23VALV275
RHCD2PHEA30LHCG2VALV275
RHCD2PHEA30LHHG21VALV275
RHCD2PHEA30LHHG22VALV275
RHCD2PHEA30LHHG23VALV275
RHCE1PHEA30LHHG12VALV271
RHCE1PHEA30LHHD22LEUV274
RHCE1PHEA30LHCG2VALV275
RHCE1PHEA30LHHG21VALV275
RHCE1PHEA30LHHG22VALV275
RHCE1PHEA30LHHG23VALV275
RHCE2PHEA30LHCBVALV275
RHCE2PHEA30LHCG1VALV275
RHCE2PHEA30LHCG2VALV275
RHCE2PHEA30LHHG12VALV275
RHCE2PHEA30LHHG13VALV275
RHCE2PHEA30LHHG21VALV275
RHCE2PHEA30LHHG22VALV275
RHCE2PHEA30LHHG23VALV275
RHCE2PHEA30LHHD21LEUV279
RHCE2PHEA30LHHD23LEUV279
RHCZPHEA30LHCAVALV275
RHCZPHEA30LHCBVALV275
RHCZPHEA30LHCG1VALV275
RHCZPHEA30LHCG2VALV275
RHCZPHEA30LHHAVALV275
RHCZPHEA30LHHG12VALV275
RHCZPHEA30LHHG13VALV275
RHCZPHEA30LHHG21VALV275
RHCZPHEA30LHHG22VALV275
RHCZPHEA30LHHG23VALV275
RHCZPHEA30LHHD21LEUV279
RHCZPHEA30LHHD23LEUV279
RHCGLEUA34LHHD13LEUV32
RHCGLEUA34LHHD12LEUV279
RHCGLEUA34LHHD23LEUV279
RHCD1LEUA34LHHD12LEUV32
RHCD1LEUA34LHHD13LEUV32
RHCD1LEUA34LHCGLEUV279
RHCD1LEUA34LHCD1LEUV279
RHCD1LEUA34LHCD2LEUV279
RHCD1LEUA34LHHB3LEUV279
RHCD1LEUA34LHHD11LEUV279
RHCD1LEUA34LHHD12LEUV279
RHCD1LEUA34LHHD13LEUV279
RHCD1LEUA34LHHD22LEUV279
RHCD1LEUA34LHHD23LEUV279
RHCD2LEUA34LHHE1PHEV29
RHCD2LEUA34LHHD13LEUV32
RHCD2LEUA34LHHD12LEUV279
RHCGTYRA37LHHE1PHEV282
RHCGTYRA37LHHD22LEUV283
RHCD1TYRA37LHHD13LEUV279
RHCD1TYRA37LHCE1PHEV282
RHCD1TYRA37LHHE1PHEV282
RHCD1TYRA37LHCD2LEUV283
RHCD1TYRA37LHHD22LEUV283
RHCE1TYRA37LHHD13LEUV279
RHCE1TYRA37LHCD1PHEV282
RHCE1TYRA37LHCE1PHEV282
RHCE1TYRA37LHHD1PHEV282
RHCE1TYRA37LHHE1PHEV282
RHCE1TYRA37LHCGLEUV283
RHCE1TYRA37LHCD2LEUV283
RHCE1TYRA37LHHGLEUV283
RHCE1TYRA37LHHD13LEUV283
RHCE1TYRA37LHHD21LEUV283
RHCE1TYRA37LHHD22LEUV283
RHCE1TYRA37LHHD23LEUV283
RHCE2TYRA37LHHD22LEUV283
RHOHTYRA37LHHE1PHEV282
RHOHTYRA37LHCGLEUV283
RHOHTYRA37LHCD2LEUV283
RHOHTYRA37LHHD21LEUV283
RHOHTYRA37LHHD22LEUV283
RHOHTYRA37LHHD23LEUV283
RHCZTYRA37LHHE1PHEV282
RHCZTYRA37LHCD2LEUV283
RHCZTYRA37LHHD21LEUV283
RHCZTYRA37LHHD22LEUV283
RHCZTYRA37LHHD23LEUV283
RHCBTHRA38LHHD23LEUV32
RHCG2THRA38LHHD23LEUV32
RHOG1THRA38LHCD2LEUV32
RHOG1THRA38LHHD13LEUV32
RHOG1THRA38LHHD23LEUV32
RHCBVALA41LHHZPHEV282
RHCG1VALA41LHCZPHEV282
RHCG1VALA41LHHZPHEV282
RHCG1VALA41LHCZPHEV286
RHCG1VALA41LHHZPHEV286
RHCG2VALA41LHHZPHEV282
RHCG2VALA42LHHD13LEUV35
RHCGLEUA45LHHE1PHEV286
RHCD1LEUA45LHCE1PHEV286
RHCD1LEUA45LHCZPHEV286
RHCD1LEUA45LHHE1PHEV286
RHCD1LEUA45LHHZPHEV286
RHCD2LEUA45LHHE1PHEV286
RHCBARGA52LHHZ1LYSV307
RHOARGA52LHHZ1LYSV307
RHOARGA52LHHZ3LYSV307
RHNH1ARGA52LHHG2GLNV300
RHNH1ARGA52LHHE21GLNV300
RHNH2ARGA52LHHE21GLNV300
RHCD2LEUA53LHHE2LYSV307
RHCD2LEUA53LHHZ1LYSV307
RHCE1PHEA73LHCD1PHEV286
RHCE1PHEA73LHHD1PHEV286
RHCE1PHEA73LHHB3PHEV290
RHCE2PHEA73LHCD1PHEV286
RHCE2PHEA73LHCE1PHEV286
RHCE2PHEA73LHHD1PHEV286
RHCE2PHEA73LHHE1PHEV286
RHCZPHEA73LHCGPHEV286
RHCZPHEA73LHCD1PHEV286
RHCZPHEA73LHCE1PHEV286
RHCZPHEA73LHHB3PHEV286
RHCZPHEA73LHHD1PHEV286
RHCZPHEA73LHHE1PHEV286
RHCZPHEA73LHHB3PHEV290
RHSGCYSA74LHHZ2LYSV296
RHCG2THRA77LHHB3PHEV286
RHCG2THRA77LHHG12ILEV287
RHCG2THRA77LHHG13ILEV287
RHOG1THRA77LHHB3PHEV286
RHCAPROA81LHCD1LEUV283
RHCAPROA81LHHD12LEUV283
RHCAPROA81LHHD13LEUV283
RHCPROA81LHHD11ILEV248
RHCBPROA81LHHD11ILEV248
RHCBPROA81LHHD12ILEV248
RHCBPROA81LHCD1LEUV283
RHCBPROA81LHHD11LEUV283
RHCBPROA81LHHD12LEUV283
RHCBPROA81LHHD13LEUV283
RHCBPROA81LHHD23LEUV283
RHCBPROA81LHHD11ILEV287
RHOPROA81LHHD11ILEV248
RHOPROA81LHHD12ILEV248
RHCGPROA81LHCD1LEUV283
RHCGPROA81LHCD2LEUV283
RHCGPROA81LHHD12LEUV283
RHCGPROA81LHHD13LEUV283
RHCGPROA81LHHD22LEUV283
RHCGPROA81LHHD23LEUV283
RHCGPROA81LHHD11ILEV287
RHCDPROA81LHHD12LEUV283
RHCDPROA81LHHD23LEUV283
RHNLYSA82LHHD11ILEV248
RHNZLYSA82LHHB3PHEV247
RHCLEUA84LHHG13VALV275
RHCBLEUA84LHCD2LEUV279
RHCBLEUA84LHHD21LEUV279
RHCBLEUA84LHHD22LEUV279
RHCBLEUA84LHHD23LEUV279
RHOLEUA84LHHG13VALV275
RHOLEUA84LHHG23VALV275
RHCGLEUA84LHCD2LEUV279
RHCGLEUA84LHHD21LEUV279
RHCGLEUA84LHHD22LEUV279
RHCGLEUA84LHHD23LEUV279
RHCD1LEUA84LHCGLEUV279
RHCD1LEUA84LHCD1LEUV279
RHCD1LEUA84LHCD2LEUV279
RHCD1LEUA84LHHD13LEUV279
RHCD1LEUA84LHHD21LEUV279
RHCD1LEUA84LHHD22LEUV279
RHCD1LEUA84LHHD23LEUV279
RHCD2LEUA84LHHD22LEUV279
RHCD2LEUA84LHHD23LEUV279
RHNGLUA85LHHG13VALV275
RHCAGLUA85LHHG13VALV275
RHCBGLUA85LHHG12ILEV248
RHCBGLUA85LHHG22ILEV248
RHCGGLUA85LHHAILEV248
RHCGGLUA85LHHG12ILEV248
RHCGGLUA85LHHG22ILEV248
RHCGGLUA85LHHGSERV252
RHCDGLUA85LHOPHEV247
RHCDGLUA85LHNILEV248
RHCDGLUA85LHCAILEV248
RHCDGLUA85LHCBILEV248
RHCDGLUA85LHCG1ILEV248
RHCDGLUA85LHHAILEV248
RHCDGLUA85LHHG12ILEV248
RHCDGLUA85LHHG13ILEV248
RHCDGLUA85LHHG22ILEV248
RHOE1GLUA85LHCPHEV247
RHOE1GLUA85LHOPHEV247
RHOE1GLUA85LHHB3PHEV247
RHOE1GLUA85LHNILEV248
RHOE1GLUA85LHCAILEV248
RHOE1GLUA85LHCILEV248
RHOE1GLUA85LHOILEV248
RHOE1GLUA85LHHAILEV248
RHOE1GLUA85LHHG12ILEV248
RHOE1GLUA85LHHG13ILEV248
RHOE1GLUA85LHCBSERV251
RHOE1GLUA85LHOGSERV251
RHOE1GLUA85LHHB2SERV251
RHOE1GLUA85LHHGSERV251
RHOE1GLUA85LHHGSERV252
RHOE2GLUA85LHHB3PHEV247
RHOE2GLUA85LHNILEV248
RHOE2GLUA85LHCAILEV248
RHOE2GLUA85LHCBILEV248
RHOE2GLUA85LHCG1ILEV248
RHOE2GLUA85LHCD1ILEV248
RHOE2GLUA85LHHAILEV248
RHOE2GLUA85LHHG12ILEV248
RHOE2GLUA85LHHG13ILEV248
RHOE2GLUA85LHHG22ILEV248
RHOE2GLUA85LHHD11ILEV248
R-NVALA88LHHG23VALV272
R-CAVALA88LHHG11VALV271
R-CAVALA88LHCG2VALV272
R-CAVALA88LHHAVALV272
R-CAVALA88LHHG21VALV272
R-CAVALA88LHHG22VALV272
R-CAVALA88LHHG23VALV272
R-CVALA88LHCBVALV272
R-CVALA88LHCG2VALV272
R-CVALA88LHHG13VALV272
R-CVALA88LHHG21VALV272
R-CVALA88LHHG22VALV272
R-CVALA88LHHG23VALV272
R-CBVALA88LHCG1VALV271
R-CBVALA88LHHG11VALV271
R-CBVALA88LHNVALV272
R-CBVALA88LHCAVALV272
R-CBVALA88LHCBVALV272
R-CBVALA88LHCG2VALV272
R-CBVALA88LHHAVALV272
R-CBVALA88LHHG13VALV272
R-CBVALA88LHHG21VALV272
R-CBVALA88LHHG23VALV272
R-CBVALA88LHHBVALV275
R-CBVALA88LHHG23VALV275
R-OVALA88LHCE1PHEV255
R-OVALA88LHHE1PHEV255
R-OVALA88LHHG11VALV268
R-OVALA88LHHG13VALV268
R-OVALA88LHCBVALV272
R-OVALA88LHCG1VALV272
R-OVALA88LHCG2VALV272
R-OVALA88LHHAVALV272
R-OVALA88LHHBVALV272
R-OVALA88LHHG12VALV272
R-OVALA88LHHG13VALV272
R-OVALA88LHHG21VALV272
R-OVALA88LHHG22VALV272
R-OVALA88LHHG23VALV272
R-CG1VALA88LHCVALV271
R-CG1VALA88LHOVALV271
R-CG1VALA88LHCG1VALV271
R-CG1VALA88LHHG11VALV271
R-CG1VALA88LHHG12VALV271
R-CG1VALA88LHHG13VALV271
R-CG1VALA88LHHAVALV272
R-CG1VALA88LHHG23VALV272
R-CG1VALA88LHCG2VALV275
R-CG1VALA88LHHBVALV275
R-CG1VALA88LHHG21VALV275
R-CG1VALA88LHHG23VALV275
R-CG2VALA88LHCAVALV272
R-CG2VALA88LHCG2VALV272
R-CG2VALA88LHHAVALV272
R-CG2VALA88LHHG13VALV272
R-CG2VALA88LHHG23VALV272
R-CG2VALA88LHCBVALV275
R-CG2VALA88LHCG1VALV275
R-CG2VALA88LHCG2VALV275
R-CG2VALA88LHHBVALV275
R-CG2VALA88LHHG13VALV275
R-CG2VALA88LHHG23VALV275
R-NVALA89LHCG2VALV272
R-NVALA89LHHG22VALV272
R-NVALA89LHHG23VALV272
R-CAVALA89LHHG22VALV272
R-CAVALA89LHHG23VALV272
R-CG1VALA89LHCASERV252
R-CG1VALA89LHOGSERV252
R-CG1VALA89LHHASERV252
R-CG1VALA89LHHGSERV252
R-CG1VALA89LHHG13VALV272
R-NGLUA90LHCGPHEV255
R-NGLUA90LHCD2PHEV255
R-NGLUA90LHCE2PHEV255
R-NGLUA90LHCZPHEV255
R-NGLUA90LHHD2PHEV255
R-NGLUA90LHHE2PHEV255
R-CAGLUA90LHCD2PHEV255
R-CAGLUA90LHCE2PHEV255
R-CAGLUA90LHHD2PHEV255
R-CAGLUA90LHHE2PHEV255
R-CBGLUA90LHCD2PHEV255
R-CBGLUA90LHCE2PHEV255
R-CBGLUA90LHCZPHEV255
R-CBGLUA90LHHD2PHEV255
R-CBGLUA90LHHE2PHEV255
R-CBGLUA90LHHZPHEV255
R-CBGLUA90L-CE1HISV264
R-CBGLUA90L-NE2HISV264
R-CBGLUA90L-HE1HISV264
R-CBGLUA90L-HE2HISV264
R-CGGLUA90LHCE2PHEV255
R-CGGLUA90LHHD2PHEV255
R-CGGLUA90LHHE2PHEV255
R-CGGLUA90L-CE1HISV264
R-CGGLUA90L-NE2HISV264
R-CGGLUA90L-HE1HISV264
R-CGGLUA90L-HE2HISV264
R-CDGLUA90LHCE2PHEV255
R-CDGLUA90LHHD2PHEV255
R-CDGLUA90LHHE2PHEV255
R-CDGLUA90L-NH1ARGV259
R-CDGLUA90L-HH11ARGV259
R-CDGLUA90L-HH12ARGV259
R-CDGLUA90L-CD2HISV264
R-CDGLUA90L-ND1HISV264
R-CDGLUA90L-CE1HISV264
R-CDGLUA90L-NE2HISV264
R-CDGLUA90L-HE1HISV264
R-CDGLUA90L-HE2HISV264
R-OE1GLUA90LHHE2PHEV255
R-OE1GLUA90L-NH1ARGV259
R-OE1GLUA90L-HH11ARGV259
R-OE1GLUA90L-HH12ARGV259
R-OE1GLUA90L-CD2HISV264
R-OE1GLUA90L-ND1HISV264
R-OE1GLUA90L-CE1HISV264
R-OE1GLUA90L-NE2HISV264
R-OE1GLUA90L-HE1HISV264
R-OE1GLUA90L-HE2HISV264
R-OE2GLUA90LHCD2PHEV255
R-OE2GLUA90LHCE2PHEV255
R-OE2GLUA90LHHD2PHEV255
R-OE2GLUA90LHHE2PHEV255
R-OE2GLUA90L-NH1ARGV259
R-OE2GLUA90L-HD3ARGV259
R-OE2GLUA90L-HH11ARGV259
R-OE2GLUA90L-HH12ARGV259
R-OE2GLUA90L-CGHISV264
R-OE2GLUA90L-CD2HISV264
R-OE2GLUA90L-ND1HISV264
R-OE2GLUA90L-CE1HISV264
R-OE2GLUA90L-NE2HISV264
R-OE2GLUA90L-HD2HISV264
R-OE2GLUA90L-HE1HISV264
R-OE2GLUA90L-HE2HISV264
R-NTYRA91LHHD2PHEV255
R-OTYRA91LHHB3SERV251
R-CD2TYRA91LHHD2PHEV255
R-CE2TYRA91LHHD2PHEV255
R-OHTYRA91L-NH1ARGV259
R-OHTYRA91L-HD2ARGV259
R-OHTYRA91L-HH11ARGV259
R-OHTYRA91L-HH12ARGV259
RSOTHRA93LHHD1PHEV247
RSNSERA95LHCE1PHEV247
RSNSERA95LHCE2PHEV247
RSNSERA95LHCZPHEV247
RSNSERA95LHHE1PHEV247
RSNSERA95LHHE2PHEV247
RSNSERA95LHHZPHEV247
RSCASERA95LHCE1PHEV247
RSCASERA95LHCE2PHEV247
RSCASERA95LHCZPHEV247
RSCASERA95LHHE2PHEV247
RSCASERA95LHHZPHEV247
RSCBSERA95LHCE1PHEV247
RSCBSERA95LHCE2PHEV247
RSCBSERA95LHCZPHEV247
RSCBSERA95LHHE1PHEV247
RSCBSERA95LHHE2PHEV247
RSCBSERA95LHHZPHEV247
RSOGSERA95LHHD12LEUV243
RSOGSERA95LHHD22LEUV243
RSOGSERA95LHCD2PHEV247
RSOGSERA95LHCE1PHEV247
RSOGSERA95LHCE2PHEV247
RSOGSERA95LHCZPHEV247
RSOGSERA95LHHE2PHEV247
RSOGSERA95LHHZPHEV247
RHCBSERA97LHHG23VALV220
RHCBSERA97LHHD12LEUV243
RHOGSERA97LHHG23VALV220
RHOGSERA97LHCD1LEUV243
RHOGSERA97LHHD11LEUV243
RHOGSERA97LHHD12LEUV243
RHOGSERA97LHHD13LEUV243
RHNGLYA98LHHD12LEUV243
RHNGLYA98LHHE2PHEV247
RHCBMETA101LHHA3GLYV240
RHCGMETA101LHCD1PHEV236
RHCGMETA101LHHB3PHEV236
RHCGMETA101LHHD1PHEV236
RHCGMETA101LHHA2GLYV240
RHCGMETA101LHHA3GLYV240
RHSDMETA101LHCAPHEV236
RHSDMETA101LHCPHEV236
RHSDMETA101LHCBPHEV236
RHSDMETA101LHOPHEV236
RHSDMETA101LHCGPHEV236
RHSDMETA101LHCD1PHEV236
RHSDMETA101LHHAPHEV236
RHSDMETA101LHHB2PHEV236
RHSDMETA101LHHB3PHEV236
RHSDMETA101LHHD1PHEV236
RHCEMETA101LHCAPHEV236
RHCEMETA101LHCPHEV236
RHCEMETA101LHCBPHEV236
RHCEMETA101LHOPHEV236
RHCEMETA101LHHB2PHEV236
RHCEMETA101LHHB3PHEV236
RHCEMETA101LHHD1PHEV236
RHCEMETA101LHNSERV237
RHCEMETA101LHCASERV237
RHCEMETA101LHHASERV237
RHCEMETA101LHHA3GLYV240
RHCE1PHEA105LHHASERV237
RHCE2PHEA105LHHASERV237
RHCZPHEA105LHCASERV237
RHCZPHEA105LHCBSERV237
RHCZPHEA105LHOGSERV237
RHCZPHEA105LHHASERV237
RHCZPHEA105LHHB2SERV237
RHCBILEA155LHHE22GLNV233
RHCG1ILEA155LHHE22GLNV233
RHCG2ILEA155LHNE2GLNV233
RHCG2ILEA155LHHE21GLNV233
RHCG2ILEA155LHHE22GLNV233
RHCD1ILEA155LHHE22GLNV233
RHCD1LEUA159LHOE1GLNV233
RHCD2LEUA159LHHB2GLNV233
RHCD2LEUA159LHHG3GLNV233
R-NE2HISA314LHHD12LEUV34
R-NE2HISA314LHHD23LEUV34

 - Title of columns started by 'R:' means Receptor, 'L:' means Ligand
 - In the Secondary Structure columns: 'H' means that residues/atoms in that row are part of Alpha Helix; 'S' - Beta Sheet


Krembil, Jurisica Lab.   July 16, 2025     Database: 1.0.4.1