Chains and heterogens:
PDB Chain Sequences:
>1trg_ (-) mkqylelmqkvldegtqkndrtgtgtlsifghqmrfnlqdgfplvttkrchlrsiihell wflqgdtniaylhennvtiwdewadengdlgpvygkqwrawptpdgrhidqittvlnqlk ndpdsrriivsawnvgeldkmalapchaffqfyvadgklscqlyqrscdvflglpfnias yallvhmmaqqcdlevgdfvwtggdthlysnhmdqthlqlsreprplpkliikrkpesif dyrfedfeiegydphpgikapvai