>1s5aA (A:) observed residues (from ATOM records) mnefekacetlrkfmaymlekdmkswtelwdenavfefpyapegspkriegkaaiydyik dypkqihlssftaptvyrsadsntviaefqcdghvietglpyrqsyisvietrdgrivry rdywnplvvkeafggsflq