Chains and heterogens:
PDB Chain Sequences:
>2f12A (A:) gsmaslpvlqkesvfqsgahayripallylpgqqsllafaeqraskkdehaelivlrrgd ydapthqvqwqaqevvaqarldghrsmnpcplydaqtgtlflffiaipgqvteqqqlqtr anvtrlcqvtstdhgrtwssprdltdaaigpayrewstfavgpghclqlndrarslvvpa yayrklhpiqrpipsafcflshdhgrtwarghfvaqdtlecqvaevetgeqrvvtlnars hlrarvqaqstndgldfqesqlvkklvepppqgcqgsvisfpsprsgpgspaqwllythp thswqradlgaylnprppapeawsepvllakgscaysdlqsmgtgpdgsplfgclyeand yeeivflmftlkqafpaeylpq
>2f12A (A:) slpvlqkesvfqsgahayripallylpgqqsllafaeqraaelivlrrgdydapthqvqw qaqevvaqarldghrsmnpcplydaqtgtlflffiaipgqvteqqqlqtranvtrlcqvt stdhgrtwssprdltdaaigpayrewstfavgpghclqlndrarslvvpayayrklhiqr pipsafcflshdhgrtwarghfvaqdtlecqvaeveqrvvtlnarshlrarvqaqstndg ldfqesqlvkklvepppqgcqgsvisfpspraqwllythpthswqradlgaylnprppap eawsepvllakgscaysdlqsmgtgpdgsplfgclyeandyeeivflmftlkqafpaey