Chains and heterogens:
PDB Chain Sequences:
>1k2dA (A:) hsrgeddieadhvgsygivvyqspgdigqytfefdgdelfyvdldkketiwmlpefaqlr sfdpqgglqniatgkhnlgvltkrsnstpatneapqatvfpkspvllgqpntlicfvdni fppvinitwlrnsksvadgvyetsffvnrdysfhklsyltfipsdddiydckvehwglee pvlkhwepe
>1k2dA (A:) ieadhvgsygivvyqspgdigqytfefdgdelfyvdldkketiwmlpefaqlrsfdpqgg lqniatgkhnlgvltkrsnstpatneapqatvfpkspvllgqpntlicfvdnifppvini twlrnsksvadgvyetsffvnrdysfhklsyltfipsdddiydckvehwgleepvlkhwe pe
>1k2dB (B:) gdserhfvvqfqpfcyftngtqriryvtryiynreeylrfdsdvgeyravtelgrpdaey ynkqylertraeldtvcrynyeetevptslrrleqpnvvislsrtealnhhntlvcsvtd fypakikvrwfrngqeetvgvsstqlirngdwtfqvlvmlemtprrgevytchvehpslk spitvewra
>1k2dB (B:) rhfvvqfqpfcyftngtqriryvtryiynreeylrfdsdvgeyravtelgrpdaeyynkq ylertraeldtvcrynyeetevptslrrleqpnvvislsrtealnhhntlvcsvtdfypa kikvrwfrngqeetvgvsstqlirngdwtfqvlvmlemtprrgevytchvehpslkspit vewra