Chains and heterogens:
PDB Chain Sequences:
>1sy6A (A:) mqsikgnhlvkvydyqedgsvlltcdaeaknitwfkdgkmigfltedkkkwnlgsnakdp rgmyqckgsqnkskplqvyyrmgsaddakkdaakkddakkddakkdgsdgneemggitqt pykvsisgttviltcpqypgseilwqhndkniggdeddknigsdedhlslkefseleqsg yyvcyprgskpedanfylylrarv
>1sy6A (A:) mqsikgnhlvkvydyqedgsvlltcdaeaknitwfkdgkmigfltedkkkwnlgsnakdp rgmyqckgsqnkskplqvyyrmqtpykvsisgttviltcpqypgseilwqhndkniggde ddknigsdedhlslkefseleqsgyyvcyprgskpedanfylylrarv
>1sy6H (H:) qvqlqqsgaelarpgasvkmsckasgytftrytmhwvkqrpgqglewigyinpsrgytny nqkfkdkatlttdkssstaymqlssltsedsavyycaryyddhycldywgqgttltvssa kttapsvyplapvcggttgssvtlgclvkgyfpepvtltwnsgslssgvhtfpavlqsdl ytlsssvtvtsstwpsqsitcnvahpasstkvdkkiepr
>1sy6L (L:) qivltqspaimsaspgekvtmtcsasssvsymnwyqqksgtspkrwiydtsklasgvpah frgsgsgtsysltisgmeaedaatyycqqwssnpftfgsgtkleinradtaptvsifpps seqltsggasvvcflnnfypkdinvkwkidgserqngvlnswtdqdskdstysmsstltl tkdeyerhnsytceathktstspivksfnrnec