>2pxrC (C:) observed residues (from ATOM records)
pivqnlqgqmvhqaisprtlnawvkvveekafspevipmfsalsegatpqdlntmlntvg
ghqaamqmlketineeaaewdrlhpvhagpiapgqmreprgsdiagttstlqeqigwmth
nppipvgeiykrwiilglnkivrmy