Chains and heterogens:
PDB Chain Sequences:
>1fpsA (A:) spvvverereefvgffpqivrdltedgighpevgdavarlkevlqynapggkcnrgltvv aayrelsgpgqkdaeslrcalavgwcielfqafflvaddimdqsltrrgqlcwykkegvg ldaindsfllessvyrvlkkycrqrpyyvhllelflqtayqtelgqmldlitapvskvdl shfseerykaivkyktafysfylpvaaamymvgidskeehenakaillemgeyfqiqddy ldcfgdpaltgkvgtdiqdnkcswlvvqclqrvtpeqrqllednygrkepekvakvkely eavgmraafqqyeessyrrlqeliekhsnrlpkeiflglaqkiykrqk