Chains and heterogens:
PDB Chain Sequences:
>1amp_ (-) mppitqqatvtawlpqvdasqitgtisslesftnrfytttsgaqasdwiasewqalsasl pnasvkqvshsgynqksvvmtitgseapdewivigghldstigshtneqsvapgadddas giaavtevirvlsennfqpkrsiafmayaaeevglrgsqdlanqyksegknvvsalqldm tnykgsaqdvvfitdytdsnftqyltqlmdeylpsltygfdtcgyacsdhaswhnagypa ampfeskfndynprihttqdtlansdptgshakkftqlglayaiemgsatg