Chains and heterogens:
PDB Chain Sequences:
>1iakA (A:) eddieadhvgsygitvyqspgdigqytfefdgdelfyvdldkketvwmlpefaqlrrfep qgglqniatgkhnleiltkrsnstpatneapqatvfpkspvllgqpntlicfvdnifppv initwlrnsksvtdgvyetsffvnrdysfhklsyltfipsdddiydckvehwgleepvlk hwepeipapmseltetvvc
>1iakA (A:) ieadhvgsygitvyqspgdigqytfefdgdelfyvdldkketvwmlpefaqlrrfepqgg lqniatgkhnleiltkrsnstpatneapqatvfpkspvllgqpntlicfvdnifppvini twlrnsksvtdgvyetsffvnrdysfhklsyltfipsdddiydckvehwgleepvlkhwe pe
>1iakB (B:) gsfvhqfqpfcyftngtqrirlviryiynreeyvrfdsdvgeyravtelgrpdaeywnkq ylertraeldtvcrhnyektetptslrrleqpsvvislsrtealnhhntlvcsvtdfypa kikvrwfrngqeetvgvsstqlirngdwtfqvlvmlemtprrgevytchvehpsltspit vewra