Chains and heterogens:
PDB Chain Sequences:
>1pc8A (A:) yerldldvtsqttgeeyfrfitllrdyvssgsfsneipllrqsgggveaarfvlveltne ggdsitaaidvtnlyvvayqagsqsyflsgpgthlftgttrsslpfngsypdleqyaghr kqiplgidqliqsvtalrfpgntrtqarsililiqmiseaarfnpilwrarqyinsgasf lpdvymleletswgqqstqvqqstegvfnnpirlaipgnfvtltnvrdviaslaimlfvc
>1pc8B (B:) csaseptvrivgrngmnvdvrdddfhdgnqiqlwpsksnndpnqlwtikrdgtirsngsc lttygytagvyvmifdcntavreatiwqiwgngtiinprsnlalaassgikgttltvqtl dytlgqgwlagndtaprevtiygfndlcmesnggsvwvetcvsqqndrwalygdgsirpe qnqdqcltsgrdsvaginivscsggssgqrwvftnegailnlknglamdvanpglgqiii ypatgkpnqmwlpvp