Chains and heterogens:
PDB Chain Sequences:
>2a1nA (A:) mttetiqsnanlaplpphvpehlvfdfdmynpsnlsagvqeawavlqesnvpdlvwtrcn gghwiatrgqlireayedyrhfssecpfipreageaydfiptsmdppeqrqfralanqvv gmpvvdklenriqelacslieslrpqgqcnftedyaepfpirifmllaglpeediphlky ltdqmtrpdgsmtfaeakealydylipiieqrrqkpgtdaisivangqvngrpitsdeak rmcglllvgglntvvnflsfsmeflakspehrqelierperipaaceellrrfslvadgr iltsdyefhgvqlkkgdqillpqmlsglderenaapmhvdfsrqkvshttfghgshlclg qhlarreiivtlkewltripdfsiapgaqiqhksgivsgvqalplvwdpattkav
>2a1nA (A:) nanlaplpphvpehlvfdfdmynpsnlsagvqeawavlqesnvpdlvwtrcngghwiatr gqlireayedyrhfssecpfipreageaydfiptsmdppeqrqfralanqvvgmpvvdkl enriqelacslieslrpqgqcnftedyaepfpirifmllaglpeediphlkyltdqmtrp dgsmtfaeakealydylipiieqrrqkpgtdaisivangqvngrpitsdeakrmcglllv gglntvvnflsfsmeflakspehrqelierperipaaceellrrfslvadgriltsdyef hgvqlkkgdqillpqmlsglderenaapmhvdfsrqkvshttfghgshlclgqhlarrei ivtlkewltripdfsiapgaqiqhksgivsgvqalplvwdpattkav
>2a1nB (B:) mttetiqsnanlaplpphvpehlvfdfdmynpsnlsagvqeawavlqesnvpdlvwtrcn gghwiatrgqlireayedyrhfssecpfipreageaydfiptsmdppeqrqfralanqvv gmpvvdklenriqelacslieslrpqgqcnftedyaepfpirifmllaglpeediphlky ltdqmtrpdgsmtfaeakealydylipiieqrrqkpgtdaisivangqvngrpitsdeak rmcglllvgglntvvnflsfsmeflakspehrqelierperipaaceellrrfslvadgr iltsdyefhgvqlkkgdqillpqmlsglderenaapmhvdfsrqkvshttfghgshlclg qhlarreiivtlkewltripdfsiapgaqiqhksgivsgvqalplvwdpattkav
>2a1nB (B:) nlaplpphvpehlvfdfdmynpsnlsagvqeawavlqesnvpdlvwtrcngghwiatrgq lireayedyrhfssecpfipreageaydfiptsmdppeqrqfralanqvvgmpvvdklen riqelacslieslrpqgqcnftedyaepfpirifmllaglpeediphlkyltdqmtrpdg smtfaeakealydylipiieqrrqkpgtdaisivangqvngrpitsdeakrmcglllvgg lntvvnflsfsmeflakspehrqelierperipaaceellrrfslvadgriltsdyefhg vqlkkgdqillpqmlsglderenaapmhvdfsrqkvshttfghgshlclgqhlarreiiv tlkewltripdfsiapgaqiqhksgivsgvqalplvwdpattkav