Chains and heterogens:
PDB Chain Sequences:
>1tfmA (A:) yerldldvtsqttgeeyfrfitllrdyvssgsfsneipllrqsgggveaarfvlveltne ggdsitaaidvtnlyvvayqagsqsyflsgpgthlftgttrsslpfngsypdleqyaghr kqiplgidqliqsvtalrfpgntrtqarsililiqmiseaarfnpilwrarqyinsgasf lpdvymleletswgqqstqvqqstegvfnnpirlaipgnfvtltnvrdviaslaimlfvc
>1tfmB (B:) csaseptvrivgrngmnvdvrdddfhdgnqiqlwpsksnndpnqlwtikrdgtirsngsc lttygytagvyvmifdcntavreatiwqiwgngtiinprsnlalaassgikgttltvqtl dytlgqgwlagndtaprevtiygfndlcmesnggsvwvetcvsqqndrwalygdgsirpe qnqdqcltsgrdsvaginivscsggssgqrwvftnegailnlknglamdvanpglgqiii ypatgkpnqmwlpvp