>4b4nA (A:) observed residues (from ATOM records)
pivqnlqgqmvhqaisprtlnawvkvveekafspevipmfsalsegatpqdlntmlntvg
ghqaamqmlketineeaaewdrlhpvreprgsdiagttstlqeqigwmthnppipvgeiy
krwiilglnkivrmys