>1s5aB (B:) observed residues (from ATOM records) snamlmnefekacetlrkfmaymlekdmkswtelwdenavfefpyapegspkriegkaai ydyikdypkqihlssftaptvyrsadsntviaefqcdghvietglpyrqsyisvietrdg rivryrdywnplvvkeafggsfl