Chains and heterogens:
PDB Chain Sequences:
>1w20A (A:) rtflnltkplcevnswhilskdnairigedahilvtrepylscdpqgcrmfalsqgttlr grhangtihdrspfraliswemgqapspyntrvecigwsstschdgmsrmsicmsgpnnn asavvwyggrpiteipswagnilrtqesecvchkgvcpvvmtdgpannraatkiiyfkeg kiqkieelagnaqhieecscygaggvikcicrdnwkganrpvitidpemmthtskylcsk vltdtsrpndptngncdapitggspdpgvkgfafldgenswlgrtiskdsrsgyemlkvp naetdiqsgpisnqvivnnqnwsgysgafidywankecfnpcfyvelirgrpkessvlwt snsivalcgskkrlgswswhdgaeiiyfe
>1w20B (B:) rtflnltkplcevnswhilskdnairigedahilvtrepylscdpqgcrmfalsqgttlr grhangtihdrspfraliswemgqapspyntrvecigwsstschdgmsrmsicmsgpnnn asavvwyggrpiteipswagnilrtqesecvchkgvcpvvmtdgpannraatkiiyfkeg kiqkieelagnaqhieecscygaggvikcicrdnwkganrpvitidpemmthtskylcsk vltdtsrpndptngncdapitggspdpgvkgfafldgenswlgrtiskdsrsgyemlkvp naetdiqsgpisnqvivnnqnwsgysgafidywankecfnpcfyvelirgrpkessvlwt snsivalcgskkrlgswswhdgaeiiyfe
>1w20C (C:) rtflnltkplcevnswhilskdnairigedahilvtrepylscdpqgcrmfalsqgttlr grhangtihdrspfraliswemgqapspyntrvecigwsstschdgmsrmsicmsgpnnn asavvwyggrpiteipswagnilrtqesecvchkgvcpvvmtdgpannraatkiiyfkeg kiqkieelagnaqhieecscygaggvikcicrdnwkganrpvitidpemmthtskylcsk vltdtsrpndptngncdapitggspdpgvkgfafldgenswlgrtiskdsrsgyemlkvp naetdiqsgpisnqvivnnqnwsgysgafidywankecfnpcfyvelirgrpkessvlwt snsivalcgskkrlgswswhdgaeiiyfe
>1w20D (D:) rtflnltkplcevnswhilskdnairigedahilvtrepylscdpqgcrmfalsqgttlr grhangtihdrspfraliswemgqapspyntrvecigwsstschdgmsrmsicmsgpnnn asavvwyggrpiteipswagnilrtqesecvchkgvcpvvmtdgpannraatkiiyfkeg kiqkieelagnaqhieecscygaggvikcicrdnwkganrpvitidpemmthtskylcsk vltdtsrpndptngncdapitggspdpgvkgfafldgenswlgrtiskdsrsgyemlkvp naetdiqsgpisnqvivnnqnwsgysgafidywankecfnpcfyvelirgrpkessvlwt snsivalcgskkrlgswswhdgaeiiyfe