Chains and heterogens:
PDB Chain Sequences:
>4zfaA (A:) mtikempqpktfgelknlpllntdkpvqalmkiadelgeifkfeapgrvtrylssqrlik eacdesrfdknlsqalkfvrdfagdglftswtheknwkkahnillpsfsqqamkgyhamm vdiavqlvqkwerlnadehievpedmtrltldtiglcgfnyrfnsfyrdqphpfitsmvr aldeamnklqranpddpaydenkrqfqedikvmndlvdkiiadrkasgeqsddllthmln gkdpetgeplddeniryqiitfliaghettsgllsfalyflvknphvlqkaaeeaarvlv dpvpsykqvkqlkyvgmvlnealrlwptapafslyakedtvlggeyplekgdelmvlipq lhrdktiwgddveefrperfenpsaipqhafkpfgngqracigqqfalheatlvlgmmlk hfdfedhtnyeldiketltlkpegfvvkakskkiplggipsthhhhhh
>4zfaA (A:) tikempqpktfgelknlpllntdkpvqalmkiadelgeifkfeapgrvtrylssqrlike acdesrfdknlsqalkfvrdfagdglftswtheknwkkahnillpsfsqqamkgyhammv diavqlvqkwerlnadehievpedmtrltldtiglcgfnyrfnsfyrdqphpfitsmvra ldeamnklqranpddpaydenkrqfqedikvmndlvdkiiadrkasgeqsddllthmlng kdpetgeplddeniryqiitfliaghettsgllsfalyflvknphvlqkaaeeaarvlvd pvpsykqvkqlkyvgmvlnealrlwptapafslyakedtvlggeyplekgdelmvlipql hrdktiwgddveefrperfenpsaipqhafkpfgngqracigqqfalheatlvlgmmlkh fdfedhtnyeldiketltlkpegfvvkakskkiplggips