>2c53A (A:) observed residues (from ATOM records)
ldwttfrrvfliddawrplmepelanpltahllaeynrrcqteevlppredvfswtryct
pdevrvviigqnpyhhpgqahglafsvranvppppslrnvlaavkncypearmsghgcle
kwardgvlllnttltvkrgaaashsrigwdrfvggvirrlaarrpglvfmlwgthaqnai
rpdprvhcvlkfsnpsplskvpfgtcqhflvanryletrsispidwsv