>1fx5A (A:) observed residues (from ATOM records)
sddlsfkfknfsqngkdlsfqgnasvietgvlqlnkvgnnlpdetggiaryiapihiwnc
ntgelasfitsfsffmetsanpkaatdgltfflappdsplrraggyfglfndtkcdssyq
tvavefdtigspvnfwdpgfphigidvncvksinaerwnkryglnnvanveiiyeasskt
ltasltypsdqtsisvtsivdlkeilpewvsvgfsgstyigrqathevlnwyftstfint