>4en3A (A:) observed residues (from ATOM records)
qalsiqegenatmncsyktsinnlqwyrqnsgrglvhlilirsnerekhsgrlrvtldts
kksssllitasraadtasyfcatydrgstlgrlyfgrgtqltvwpdiqnpdpavyqlrds
ksvclftdfdsqtnvsqskdvyitdkcvldmrmdfksnsavawsnksdacanafnnsiip
edtffp