Q9C056_A6NHT5.1 contacts (residues)

ReceptorR: Secondary StructureR: ResidueR; ChainR: Residue numberLigandL: Secondary StructureL: ResidueL: ChainL: Residue Number
R-ARGA112L-ALAV42
R-ARGA112L-PROV43
RHGLNA301L-GLYV55
RHGLNA301L-THRV56
R-ARGA302L-PROV53
R-ILEA303L-PROV57
R-VALA304L-PROV53
R-VALA304L-LEUV54
R-VALA304L-GLYV55
R-VALA304L-THRV56
R-VALA304L-PROV57
R-VALA306L-GLNV51
R-ILEA308L-ALAV50
R-ILEA308L-GLNV51
R-LEUA335L-GLYV47
R-PHEA337L-GLYV46
R-PHEA337L-GLYV47
R-VALA351L-TYRV172
R-PROA352L-TYRV172
R-LEUA354LHGLNV169
R-LEUA354L-THRV170
RHLEUA36L-PROV37
RHLEUA37L-PROV37
RHLEUA37L-ALAV38
R-ASPA40L-GLNV35
R-PROA51L-LEUV29
R-THRA54L-LYSV26
R-LEUA55L-LYSV26
R-PHEA56L-METV25
R-PHEA56L-LYSV26
R-ALAA57L-METV22
R-ALAA57L-METV25
R-PROA58L-METV22
R-ALAA59L-METV22
R-SERA60L-LEUV19
R-ALAA67LHGLNV197
R-ALAA68LHGLNV197
R-ALAA68LHASNV198
R-ALAA70L-ARGV152
R-ALAA70LHVALV194
R-ALAA70LHASNV198
R-ALAA71L-ARGV152
R-ALAA71LHVALV194
R-ALAA72L-ARGV152
R-ALAA72L-PROV153
R-ALAA73L-HISV150
R-ALAA73L-SERV151
R-ALAA73L-ARGV152
R-ALAA73L-PROV153
R-LYSA74L-HISV150
R-LYSA74L-PROV153
R-GLYA75L-HISV150
R-ALAA76L-ALAV136
R-ALAA76L-PROV137
R-ALAA76L-GLYV139
R-ALAA76L-GLYV140
R-ALAA76L-LYSV148
R-ALAA76L-HISV150
R-LEUA77L-PROV135
R-LEUA77L-ALAV136
R-LEUA77L-PROV137
R-LEUA77L-ALAV138
R-LEUA77L-GLYV139
R-LEUA77L-LYSV148
R-GLUA78L-PROV135
R-GLUA78L-ALAV136
R-GLUA78L-PROV137
R-GLUA78L-ALAV138
R-GLYA79L-PROV135
R-ALAA80L-PROV135

 - 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





Q9C056_A6NHT5.1 contacts (residues & atoms)

ReceptorR: Secondary StructureR: AtomR: ResidueR; ChainR: Residue numberLigandL: Secondary StructureL; AtomL: ResidueL: ChainL: Residue Number
RHOLEUA36L-HG2PROV37
RHCALEUA37L-HG2PROV37
RHCALEUA37L-HD3PROV37
RHCLEUA37L-HG2PROV37
RHCLEUA37L-HD3PROV37
RHCBLEUA37L-HD3PROV37
RHOLEUA37L-CGPROV37
RHOLEUA37L-CDPROV37
RHOLEUA37L-HG2PROV37
RHOLEUA37L-HG3PROV37
RHOLEUA37L-HD2PROV37
RHOLEUA37L-HD3PROV37
RHCGLEUA37L-OPROV37
RHCGLEUA37L-CDPROV37
RHCGLEUA37L-HG2PROV37
RHCGLEUA37L-HD3PROV37
RHCD1LEUA37L-CPROV37
RHCD1LEUA37L-OPROV37
RHCD1LEUA37L-CDPROV37
RHCD1LEUA37L-HG2PROV37
RHCD1LEUA37L-HD3PROV37
RHCD1LEUA37L-HB2ALAV38
RHCD1LEUA37L-HB3ALAV38
RHCD2LEUA37L-HD3PROV37
R-CBASPA40L-NE2GLNV35
R-CBASPA40L-HE21GLNV35
R-CBASPA40L-HE22GLNV35
R-CGASPA40L-HE22GLNV35
R-OD1ASPA40L-HE22GLNV35
R-CBPROA51L-HD13LEUV29
R-CGPROA51L-HD13LEUV29
R-CATHRA54L-HE2LYSV26
R-CATHRA54L-HZ2LYSV26
R-CTHRA54L-CDLYSV26
R-CTHRA54L-CELYSV26
R-CTHRA54L-NZLYSV26
R-CTHRA54L-HD3LYSV26
R-CTHRA54L-HE2LYSV26
R-CTHRA54L-HZ1LYSV26
R-CTHRA54L-HZ2LYSV26
R-CBTHRA54L-CELYSV26
R-CBTHRA54L-HE2LYSV26
R-CBTHRA54L-HZ1LYSV26
R-CBTHRA54L-HZ2LYSV26
R-OTHRA54L-CGLYSV26
R-OTHRA54L-CDLYSV26
R-OTHRA54L-CELYSV26
R-OTHRA54L-NZLYSV26
R-OTHRA54L-HG2LYSV26
R-OTHRA54L-HD2LYSV26
R-OTHRA54L-HD3LYSV26
R-OTHRA54L-HE2LYSV26
R-OTHRA54L-HZ1LYSV26
R-OTHRA54L-HZ2LYSV26
R-OG1THRA54L-CELYSV26
R-OG1THRA54L-HG2LYSV26
R-OG1THRA54L-HE2LYSV26
R-OG1THRA54L-HE3LYSV26
R-NLEUA55L-NZLYSV26
R-NLEUA55L-HD3LYSV26
R-NLEUA55L-HE2LYSV26
R-NLEUA55L-HZ1LYSV26
R-NLEUA55L-HZ2LYSV26
R-CALEUA55L-NZLYSV26
R-CALEUA55L-HD3LYSV26
R-CALEUA55L-HZ1LYSV26
R-CALEUA55L-HZ2LYSV26
R-CALEUA55L-HZ3LYSV26
R-CLEUA55L-CDLYSV26
R-CLEUA55L-CELYSV26
R-CLEUA55L-NZLYSV26
R-CLEUA55L-HD2LYSV26
R-CLEUA55L-HD3LYSV26
R-CLEUA55L-HE2LYSV26
R-CLEUA55L-HZ1LYSV26
R-CLEUA55L-HZ2LYSV26
R-CLEUA55L-HZ3LYSV26
R-CBLEUA55L-HZ2LYSV26
R-OLEUA55L-CDLYSV26
R-OLEUA55L-CELYSV26
R-OLEUA55L-NZLYSV26
R-OLEUA55L-HD2LYSV26
R-OLEUA55L-HD3LYSV26
R-OLEUA55L-HE2LYSV26
R-OLEUA55L-HE3LYSV26
R-OLEUA55L-HZ1LYSV26
R-OLEUA55L-HZ2LYSV26
R-OLEUA55L-HZ3LYSV26
R-NPHEA56L-CDLYSV26
R-NPHEA56L-CELYSV26
R-NPHEA56L-NZLYSV26
R-NPHEA56L-HD2LYSV26
R-NPHEA56L-HD3LYSV26
R-NPHEA56L-HZ1LYSV26
R-NPHEA56L-HZ2LYSV26
R-NPHEA56L-HZ3LYSV26
R-CAPHEA56L-SDMETV25
R-CAPHEA56L-CEMETV25
R-CAPHEA56L-HE1METV25
R-CAPHEA56L-HE2METV25
R-CAPHEA56L-NZLYSV26
R-CAPHEA56L-HD2LYSV26
R-CAPHEA56L-HZ2LYSV26
R-CAPHEA56L-HZ3LYSV26
R-CPHEA56L-SDMETV25
R-CPHEA56L-CEMETV25
R-CPHEA56L-HG3METV25
R-CPHEA56L-HE1METV25
R-CPHEA56L-HE2METV25
R-CPHEA56L-HD2LYSV26
R-CPHEA56L-HZ3LYSV26
R-CBPHEA56L-CGMETV25
R-CBPHEA56L-SDMETV25
R-CBPHEA56L-CEMETV25
R-CBPHEA56L-HG3METV25
R-CBPHEA56L-HE1METV25
R-CBPHEA56L-HE2METV25
R-CBPHEA56L-HE3METV25
R-CBPHEA56L-NZLYSV26
R-CBPHEA56L-HD2LYSV26
R-CBPHEA56L-HZ1LYSV26
R-CBPHEA56L-HZ2LYSV26
R-CBPHEA56L-HZ3LYSV26
R-OPHEA56L-CGMETV25
R-OPHEA56L-CEMETV25
R-OPHEA56L-HG3METV25
R-OPHEA56L-HE2METV25
R-OPHEA56L-HD2LYSV26
R-CGPHEA56L-SDMETV25
R-CGPHEA56L-CEMETV25
R-CGPHEA56L-HE1METV25
R-CGPHEA56L-HE2METV25
R-CGPHEA56L-NZLYSV26
R-CGPHEA56L-HZ3LYSV26
R-CD1PHEA56L-SDMETV25
R-CD1PHEA56L-CEMETV25
R-CD1PHEA56L-HE1METV25
R-CD1PHEA56L-HE2METV25
R-CD1PHEA56L-HE3METV25
R-CD2PHEA56L-HE1METV25
R-CD2PHEA56L-NZLYSV26
R-CD2PHEA56L-HZ1LYSV26
R-CD2PHEA56L-HZ2LYSV26
R-CD2PHEA56L-HZ3LYSV26
R-CE1PHEA56L-HE1METV25
R-NALAA57L-CEMETV25
R-NALAA57L-HE1METV25
R-NALAA57L-HE2METV25
R-CAALAA57L-HE2METV25
R-CALAA57L-HE1METV22
R-CALAA57L-HE3METV22
R-CALAA57L-HE2METV25
R-OALAA57L-CEMETV22
R-OALAA57L-HE1METV22
R-OALAA57L-HE2METV22
R-OALAA57L-HE3METV22
R-OALAA57L-CEMETV25
R-OALAA57L-HE1METV25
R-OALAA57L-HE2METV25
R-OALAA57L-HE3METV25
R-CAPROA58L-HE3METV22
R-CPROA58L-HE1METV22
R-CPROA58L-HE3METV22
R-NALAA59L-HB3METV22
R-NALAA59L-HE3METV22
R-CBALAA59L-SDMETV22
R-CBALAA59L-CEMETV22
R-CBALAA59L-HB2METV22
R-CBALAA59L-HE1METV22
R-CBALAA59L-HE3METV22
R-OALAA59L-HB2METV22
R-CBSERA60L-HD23LEUV19
R-OGSERA60L-HD12LEUV19
R-OGSERA60L-HD23LEUV19
R-OALAA67LHNE2GLNV197
R-OALAA67LHHG2GLNV197
R-OALAA67LHHG3GLNV197
R-OALAA67LHHE21GLNV197
R-CBALAA68LHHG2GLNV197
R-CBALAA68LHOD1ASNV198
R-NALAA70LHCG1VALV194
R-NALAA70LHHG12VALV194
R-NALAA70LHHG13VALV194
R-CAALAA70LHHG13VALV194
R-CALAA70L-HH12ARGV152
R-CBALAA70LHHG13VALV194
R-CBALAA70LHHD22ASNV198
R-OALAA70L-NH1ARGV152
R-OALAA70L-HH12ARGV152
R-NALAA71L-HH12ARGV152
R-CALAA71L-NH1ARGV152
R-CALAA71L-HH11ARGV152
R-CALAA71L-HH12ARGV152
R-CBALAA71LHHG13VALV194
R-OALAA71L-NH1ARGV152
R-OALAA71L-HH11ARGV152
R-OALAA71L-HH12ARGV152
R-CAALAA72L-CBPROV153
R-CAALAA72L-CGPROV153
R-CAALAA72L-CDPROV153
R-CAALAA72L-HB2PROV153
R-CAALAA72L-HG2PROV153
R-CAALAA72L-HD3PROV153
R-CALAA72L-HAARGV152
R-CALAA72L-HG2ARGV152
R-CALAA72L-NPROV153
R-CALAA72L-CBPROV153
R-CALAA72L-CGPROV153
R-CALAA72L-CDPROV153
R-CALAA72L-HB2PROV153
R-CALAA72L-HG2PROV153
R-CALAA72L-HG3PROV153
R-CALAA72L-HD2PROV153
R-CALAA72L-HD3PROV153
R-CBALAA72L-CBPROV153
R-CBALAA72L-OPROV153
R-CBALAA72L-CGPROV153
R-CBALAA72L-CDPROV153
R-CBALAA72L-HB2PROV153
R-CBALAA72L-HB3PROV153
R-CBALAA72L-HG2PROV153
R-CBALAA72L-HD3PROV153
R-OALAA72L-CAARGV152
R-OALAA72L-CARGV152
R-OALAA72L-CBARGV152
R-OALAA72L-CGARGV152
R-OALAA72L-NH1ARGV152
R-OALAA72L-HAARGV152
R-OALAA72L-HG2ARGV152
R-OALAA72L-HG3ARGV152
R-OALAA72L-HH11ARGV152
R-OALAA72L-NPROV153
R-OALAA72L-CGPROV153
R-OALAA72L-CDPROV153
R-OALAA72L-HB2PROV153
R-OALAA72L-HG2PROV153
R-OALAA72L-HD2PROV153
R-OALAA72L-HD3PROV153
R-NALAA73L-CGPROV153
R-NALAA73L-CDPROV153
R-NALAA73L-HG2PROV153
R-NALAA73L-HG3PROV153
R-NALAA73L-HD2PROV153
R-NALAA73L-HD3PROV153
R-CAALAA73L-HAARGV152
R-CAALAA73L-NPROV153
R-CAALAA73L-CBPROV153
R-CAALAA73L-CGPROV153
R-CAALAA73L-CDPROV153
R-CAALAA73L-HG2PROV153
R-CAALAA73L-HG3PROV153
R-CAALAA73L-HD2PROV153
R-CAALAA73L-HD3PROV153
R-CALAA73L-HD2HISV150
R-CALAA73L-CGPROV153
R-CALAA73L-CDPROV153
R-CALAA73L-HG2PROV153
R-CALAA73L-HG3PROV153
R-CALAA73L-HD2PROV153
R-CALAA73L-HD3PROV153
R-CBALAA73L-HD2HISV150
R-CBALAA73L-OSERV151
R-CBALAA73L-CAARGV152
R-CBALAA73L-HAARGV152
R-CBALAA73L-NPROV153
R-CBALAA73L-CGPROV153
R-CBALAA73L-CDPROV153
R-CBALAA73L-HG2PROV153
R-CBALAA73L-HG3PROV153
R-CBALAA73L-HD2PROV153
R-CBALAA73L-HD3PROV153
R-OALAA73L-HD2HISV150
R-OALAA73L-HG2PROV153
R-OALAA73L-HG3PROV153
R-NLYSA74L-CGPROV153
R-NLYSA74L-CDPROV153
R-NLYSA74L-HG2PROV153
R-NLYSA74L-HG3PROV153
R-NLYSA74L-HD2PROV153
R-CALYSA74L-HG3PROV153
R-CLYSA74L-HE2HISV150
R-CLYSA74L-HG3PROV153
R-CBLYSA74L-HG3PROV153
R-OLYSA74L-HG3PROV153
R-NGLYA75L-HE2HISV150
R-CGLYA75L-CE1HISV150
R-CGLYA75L-HE1HISV150
R-CGLYA75L-HE2HISV150
R-OGLYA75L-ND1HISV150
R-OGLYA75L-CE1HISV150
R-OGLYA75L-NE2HISV150
R-OGLYA75L-HE1HISV150
R-OGLYA75L-HE2HISV150
R-NALAA76L-HB2ALAV136
R-CAALAA76L-OALAV136
R-CAALAA76L-HB2ALAV136
R-CAALAA76L-OPROV137
R-CALAA76L-OALAV136
R-CALAA76L-HB2ALAV136
R-CBALAA76L-OPROV137
R-CBALAA76L-HGLYV139
R-CBALAA76L-HGLYV140
R-OALAA76L-HD3LYSV148
R-OALAA76L-HE1HISV150
R-NLEUA77L-CALAV136
R-NLEUA77L-OALAV136
R-NLEUA77L-HALAV136
R-NLEUA77L-HB2ALAV136
R-NLEUA77L-HZ3LYSV148
R-CALEUA77L-CALAV136
R-CALEUA77L-OALAV136
R-CALEUA77L-HALAV136
R-CALEUA77L-CPROV137
R-CALEUA77L-OPROV137
R-CALEUA77L-HAALAV138
R-CLEUA77L-HAPROV135
R-CLEUA77L-CALAV136
R-CLEUA77L-OALAV136
R-CLEUA77L-HALAV136
R-CLEUA77L-HZ3LYSV148
R-CBLEUA77L-OALAV136
R-CBLEUA77L-HAALAV138
R-OLEUA77L-HAPROV135
R-OLEUA77L-OALAV136
R-OLEUA77L-HALAV136
R-OLEUA77L-NZLYSV148
R-OLEUA77L-HZ1LYSV148
R-OLEUA77L-HZ2LYSV148
R-OLEUA77L-HZ3LYSV148
R-CGLEUA77L-CAALAV138
R-CGLEUA77L-HAALAV138
R-CGLEUA77L-HB3ALAV138
R-CD1LEUA77L-CPROV137
R-CD1LEUA77L-NALAV138
R-CD1LEUA77L-CAALAV138
R-CD1LEUA77L-CALAV138
R-CD1LEUA77L-CBALAV138
R-CD1LEUA77L-HALAV138
R-CD1LEUA77L-HAALAV138
R-CD1LEUA77L-HB1ALAV138
R-CD1LEUA77L-HB2ALAV138
R-CD1LEUA77L-HB3ALAV138
R-CD1LEUA77L-NGLYV139
R-CD1LEUA77L-HGLYV139
R-CD2LEUA77L-HAALAV138
R-NGLUA78L-CAPROV135
R-NGLUA78L-HAPROV135
R-NGLUA78L-HB2PROV135
R-NGLUA78L-NALAV136
R-NGLUA78L-CALAV136
R-NGLUA78L-OALAV136
R-NGLUA78L-HALAV136
R-NGLUA78L-HAPROV137
R-CAGLUA78L-HAPROV135
R-CAGLUA78L-HB2PROV135
R-CAGLUA78L-HB3PROV135
R-CAGLUA78L-OALAV136
R-CGLUA78L-HB3PROV135
R-CBGLUA78L-HAPROV137
R-CBGLUA78L-HB3ALAV138
R-CDGLUA78L-HB3ALAV138
R-OE2GLUA78L-CBALAV138
R-OE2GLUA78L-HALAV138
R-OE2GLUA78L-HB1ALAV138
R-OE2GLUA78L-HB2ALAV138
R-OE2GLUA78L-HB3ALAV138
R-NGLYA79L-CBPROV135
R-NGLYA79L-HB2PROV135
R-NGLYA79L-HB3PROV135
R-CAGLYA79L-HB3PROV135
R-CGLYA79L-HB3PROV135
R-OGLYA79L-HB3PROV135
R-NALAA80L-HB3PROV135
R-NEARGA112L-HD3PROV43
R-NH1ARGA112L-HD3PROV43
R-NH2ARGA112L-HB1ALAV42
R-NH2ARGA112L-OPROV43
R-NH2ARGA112L-CDPROV43
R-NH2ARGA112L-HG2PROV43
R-NH2ARGA112L-HD3PROV43
R-CZARGA112L-HD3PROV43
RHCGLNA301L-HTHRV56
RHOGLNA301L-CAGLYV55
RHOGLNA301L-CGLYV55
RHOGLNA301L-HA2GLYV55
RHOGLNA301L-NTHRV56
RHOGLNA301L-CATHRV56
RHOGLNA301L-HTHRV56
RHOGLNA301L-HATHRV56
RHOGLNA301L-HG23THRV56
R-CAARGA302L-HG2PROV53
R-CARGA302L-HB2PROV53
R-CBARGA302L-HG2PROV53
R-OARGA302L-CBPROV53
R-OARGA302L-CGPROV53
R-OARGA302L-HB2PROV53
R-OARGA302L-HG2PROV53
R-OARGA302L-HG3PROV53
R-CGARGA302L-HG2PROV53
R-CDARGA302L-HG2PROV53
R-CAILEA303L-HD2PROV57
R-CILEA303L-HB3PROV57
R-CILEA303L-HD2PROV57
R-CBILEA303L-HD2PROV57
R-OILEA303L-CBPROV57
R-OILEA303L-HB3PROV57
R-OILEA303L-HG3PROV57
R-OILEA303L-HD2PROV57
R-CG2ILEA303L-HG3PROV57
R-NVALA304L-HB3PROV57
R-NVALA304L-HD2PROV57
R-CAVALA304L-HAPROV57
R-CAVALA304L-HB3PROV57
R-CVALA304L-HB2PROV53
R-CVALA304L-HB3PROV53
R-CBVALA304L-OLEUV54
R-CBVALA304L-HAPROV57
R-OVALA304L-CAPROV53
R-OVALA304L-CBPROV53
R-OVALA304L-HAPROV53
R-OVALA304L-HB2PROV53
R-OVALA304L-HB3PROV53
R-CG1VALA304L-OLEUV54
R-CG1VALA304L-HAPROV57
R-CG2VALA304L-OLEUV54
R-CG2VALA304L-CGLYV55
R-CG2VALA304L-OGLYV55
R-CG2VALA304L-NTHRV56
R-CG2VALA304L-CATHRV56
R-CG2VALA304L-CTHRV56
R-CG2VALA304L-OTHRV56
R-CG2VALA304L-HTHRV56
R-CG2VALA304L-HATHRV56
R-CG2VALA304L-NPROV57
R-CG2VALA304L-CAPROV57
R-CG2VALA304L-CBPROV57
R-CG2VALA304L-CDPROV57
R-CG2VALA304L-HAPROV57
R-CG2VALA304L-HB3PROV57
R-CG2VALA304L-HD2PROV57
R-CAVALA306L-HE22GLNV51
R-CBVALA306L-NE2GLNV51
R-CBVALA306L-OE1GLNV51
R-CBVALA306L-HE22GLNV51
R-CG1VALA306L-CDGLNV51
R-CG1VALA306L-NE2GLNV51
R-CG1VALA306L-OE1GLNV51
R-CG1VALA306L-HE22GLNV51
R-CG2VALA306L-NE2GLNV51
R-CG2VALA306L-HE22GLNV51
R-CG1ILEA308L-OE1GLNV51
R-CG1ILEA308L-HB2GLNV51
R-CD1ILEA308L-HB1ALAV50
R-CD1ILEA308L-HB2GLNV51
R-CD2LEUA335L-HA2GLYV47
R-CE1PHEA337L-NGLYV46
R-CE1PHEA337L-HGLYV46
R-CE1PHEA337L-HA3GLYV46
R-CE1PHEA337L-NGLYV47
R-CE1PHEA337L-HGLYV47
R-CE2PHEA337L-HA3GLYV46
R-CE2PHEA337L-HGLYV47
R-CZPHEA337L-NGLYV46
R-CZPHEA337L-CAGLYV46
R-CZPHEA337L-CGLYV46
R-CZPHEA337L-HGLYV46
R-CZPHEA337L-HA3GLYV46
R-CZPHEA337L-NGLYV47
R-CZPHEA337L-HGLYV47
R-CBVALA351L-CBTYRV172
R-CBVALA351L-HB2TYRV172
R-CBVALA351L-HB3TYRV172
R-CG1VALA351L-CATYRV172
R-CG1VALA351L-CTYRV172
R-CG1VALA351L-CBTYRV172
R-CG1VALA351L-OTYRV172
R-CG1VALA351L-CGTYRV172
R-CG1VALA351L-HB2TYRV172
R-CG1VALA351L-HB3TYRV172
R-CG2VALA351L-CBTYRV172
R-CG2VALA351L-HB2TYRV172
R-CG2VALA351L-HB3TYRV172
R-CDPROA352L-HB2TYRV172
R-CDPROA352L-HD2TYRV172
R-CBLEUA354LHOGLNV169
R-CBLEUA354L-HBTHRV170
R-CGLEUA354LHOGLNV169
R-CD1LEUA354LHOGLNV169
R-CD1LEUA354L-HATHRV170
R-CD2LEUA354LHOGLNV169

 - 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