>1y12B (B:) observed residues (from ATOM records)
avdmfikigdvkgeskdkthaeeidvlawswgmsqsgsmhmagkvnvqdlsftkyidkst
pnlmmacssgkhypqakltirkaggenqveyliitlkevlvssvstggsggedrltenvt
lnfaqvqvdyqpqkadgakdggpvkygwnirqnvqa