>4piuA (A:) observed residues (from ATOM records)
gaikvgawggnggsafdmgpayriisvkifsgdvvdgvdvtftyygktetrhyggsggtp
heivlqegeylvgmagevanytgavvlgklgfstnkkaygpfgntggtpfslpiaagkis
gffgrggkfldaigvylepla