Chains and heterogens:
PDB Chain Sequences:
>1zxq_ (-) kvfevhvrpkklavepkgslevncsttcnqpevggletslnkilldeqaqwkhylvsnis hdtvlqchftcsgkqesmnsnvsvyqpprqviltlqptlvavgksftiecrvptveplds ltlflfrgnetlhyetfgkaapapqeatatfnstadredghrnfsclavldlmsrggnif hkhsapkmleiy