Chains and heterogens:
PDB Chain Sequences:
>3b12A (A:) mfegferrlvdvgdvtincvvggsgpallllhgfpqnlhmwarvapllaneytvvcadlr gyggsskpvgapdhanysframasdqrelmrtlgferfhlvgharggrtghrmaldhpds vlslavldiiptyvmfeevdrfvaraywhwyflqqpapypekvigadpdtfyegclfgwg atgadgfdpeqleeyrkqwrdpaaihgsccdyraggtidfeldhgdlgrqvqcpalvfsg saglmhslfemqvvwaprlanmrfaslpgghffvdrfpddtarilreflsdarsgihqte rres
>3b12A (A:) mfegferrlvdvgdvtincvvggsgpallllhgfpqnlhmwarvapllaneytvvcadlr gyggsskpvgapdhanysframasdqrelmrtlgferfhlvgharggrtghrmaldhpds vlslavldiiptyvmfeevdrfvaraywhwyflqqpapypekvigadpdtfyegclfgwg atgadgfdpeqleeyrkqwrdpaaihgsccdyraggtidfeldhgdlgrqvqcpalvfsg saglmhslfemqvvwaprlanmrfaslpgghffvdrfpddtarilreflsdars
>3b12B (B:) mfegferrlvdvgdvtincvvggsgpallllhgfpqnlhmwarvapllaneytvvcadlr gyggsskpvgapdhanysframasdqrelmrtlgferfhlvgharggrtghrmaldhpds vlslavldiiptyvmfeevdrfvaraywhwyflqqpapypekvigadpdtfyegclfgwg atgadgfdpeqleeyrkqwrdpaaihgsccdyraggtidfeldhgdlgrqvqcpalvfsg saglmhslfemqvvwaprlanmrfaslpgghffvdrfpddtarilreflsdarsgihqte rres
>3b12B (B:) mfegferrlvdvgdvtincvvggsgpallllhgfpqnlhmwarvapllaneytvvcadlr gyggsskpvgapdhanysframasdqrelmrtlgferfhlvgharggrtghrmaldhpds vlslavldiiptyvmfeevdrfvaraywhwyflqqpapypekvigadpdtfyegclfgwg atgadgfdpeqleeyrkqwrdpaaihgsccdyraggtidfeldhgdlgrqvqcpalvfsg saglmhslfemqvvwaprlanmrfaslpgghffvdrfpddtarilreflsdars