>3bt2A (A:) observed residues (from ATOM records)
sncdclnggtcvsnkyfsnihwcncpkkfggqhceidksktcyegnghfyrgkastdtmg
rpclpwnsatvlqqtyhahrsdalqlglgkhnycrnpdnrrrpwcyvqvglkplvqecmv
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