Chains and heterogens:
PDB Chain Sequences:
>2a3rA (A:) meliqdtsrppleyvkgvplikyfaealgplqsfqarpddllintypksgttwvsqildm iyqggdlekcnrapiyvrvpflevndpgepsgletlkdtppprlikshlplallpqtlld qkvkvvyvarnpkdvavsyyhfhrmekahpepgtwdsflekfmagevsygswyqhvqeww elsrthpvlylfyedmkenpkreiqkilefvgrslpeetmdfmvqhtsfkemkknpmtny ttvpqelmdhsispfmrkgmagdwkttftvaqnerfdadyaekmagcslsfrsel
>2a3rA (A:) rppleyvkgvplikyfaealgplqsfqarpddllintypksgttwvsqildmiyqggdle kcnrapiyvrvpflevndpgepsgletlkdtppprlikshlplallpqtlldqkvkvvyv arnpkdvavsyyhfhrmekahpepgtwdsflekfmagevsygswyqhvqewwelsrthpv lylfyedmkenpkreiqkilefvgrslpeetmdfmvqhtsfkemkknpmtnyttvpqelm dhsispfmrkgmagdwkttftvaqnerfdadyaekmagcslsfrsel
>2a3rB (B:) meliqdtsrppleyvkgvplikyfaealgplqsfqarpddllintypksgttwvsqildm iyqggdlekcnrapiyvrvpflevndpgepsgletlkdtppprlikshlplallpqtlld qkvkvvyvarnpkdvavsyyhfhrmekahpepgtwdsflekfmagevsygswyqhvqeww elsrthpvlylfyedmkenpkreiqkilefvgrslpeetmdfmvqhtsfkemkknpmtny ttvpqelmdhsispfmrkgmagdwkttftvaqnerfdadyaekmagcslsfrsel
>2a3rB (B:) rppleyvkgvplikyfaealgplqsfqarpddllintypksgttwvsqildmiyqggdle kcnrapiyvrvpflevndpgepsgletlkdtppprlikshlplallpqtlldqkvkvvyv arnpkdvavsyyhfhrmekahpepgtwdsflekfmagevsygswyqhvqewwelsrthpv lylfyedmkenpkreiqkilefvgrslpeetmdfmvqhtsfkemkknpmtnyttvpqelm dhsispfmrkgmagdwkttftvaqnerfdadyaekmagcslsfrsel