Chains and heterogens:
PDB Chain Sequences:
>1f1zA (A:) fsevqiarrikegrgqghgkdyipwltvqevpssgrshriyshktgrvhhllsdlelavf lslewessvldireqfpllpsdtrqiaidsgikhpvirgvdqvmstdflvdckdgpfeqf aiqvkpaaalqdertleklelerrywqqkqipwfiftdkeinpvvkeniewlysvkteev saellaqlsplahilqekgdeniinvckqvdiaydlelgktlseiraltangfikfniyk sfrankcadlcisqvvnmee
>1f1zB (B:) fsevqiarrikegrgqghgkdyipwltvqevpssgrshriyshktgrvhhllsdlelavf lslewessvldireqfpllpsdtrqiaidsgikhpvirgvdqvmstdflvdckdgpfeqf aiqvkpaaalqdertleklelerrywqqkqipwfiftdkeinpvvkeniewlysvkteev saellaqlsplahilqekgdeniinvckqvdiaydlelgktlseiraltangfikfniyk sfrankcadlcisqvvnmee