Chains and heterogens:
PDB Chain Sequences:
>1qr0A (A:) mkiygiymdrplsqeenerfmtfispekrekcrrfyhkedahrtllgdvlvrsvisrqyq ldksdirfstqeygkpcipdlpdahfnishsgrwvigafdsqpigidiektkpisleiak rffskteysdllakdkdeqtdyfyhlwsmkesfikqegkglslpldsfsvrlhqdgqvsi elpdshspcyiktyevdpgykmavcaahpdfpeditmvsyeellraaa