Chains and heterogens:
PDB Chain Sequences:
>1hvc_ (-) pqitlwqrplvtiriggqlkealldtgaddtvleemnlpgkwkpkmiggiggfikvrqyd qilieicghkaigtvlvgptpvniigrnlltqigctlnfggssgpqitlwqrplvtikig gqlkealldtgaddtvleemslpgrwkpkmiggiggfikvrqydqilieicghkaigtvl vgptpvniigrnlltqigctlnf