>4pitB (B:) observed residues (from ATOM records)
mngaikvgawggnggsafdmgpayriisvkifsgdvvdgvdvtftyygktetrhyggsgg
tpheivlqegeylvgmagevanytgavvlgklgfstnkkaygpfgntggtpfslpiaagk
isgffgrggkfldaigvylepleh