Chains and heterogens:
PDB Chain Sequences:
>12gsA (A:) mppytvvyfpvrgrcaalrmlladqgqswkeevvtvetwqegslkasclygqlpkfqdgd ltlyqsntilrhlgrtlglygkdqqeaalvdmvndgvedlrckyisliytnyeagkddyv kalpgqlkpfetllsqnqggktfivgdqisfadynlldlllihevlapgcldafpllsay vgrlsarpklkaflaspeyvnlpingngkq
>12gsA (A:) pytvvyfpvrgrcaalrmlladqgqswkeevvtvetwqegslkasclygqlpkfqdgdlt lyqsntilrhlgrtlglygkdqqeaalvdmvndgvedlrckyisliytnyeagkddyvka lpgqlkpfetllsqnqggktfivgdqisfadynlldlllihevlapgcldafpllsayvg rlsarpklkaflaspeyvnlpingngkq
>12gsB (B:) mppytvvyfpvrgrcaalrmlladqgqswkeevvtvetwqegslkasclygqlpkfqdgd ltlyqsntilrhlgrtlglygkdqqeaalvdmvndgvedlrckyisliytnyeagkddyv kalpgqlkpfetllsqnqggktfivgdqisfadynlldlllihevlapgcldafpllsay vgrlsarpklkaflaspeyvnlpingngkq
>12gsB (B:) pytvvyfpvrgrcaalrmlladqgqswkeevvtvetwqegslkasclygqlpkfqdgdlt lyqsntilrhlgrtlglygkdqqeaalvdmvndgvedlrckyisliytnyeagkddyvka lpgqlkpfetllsqnqggktfivgdqisfadynlldlllihevlapgcldafpllsayvg rlsarpklkaflaspeyvnlpingngkq