>2chcA (A:) observed residues (from ATOM records)
gamgpvdeqwieilriqalcarycltintqdgegwagcftedgafefdgwvirgrpalre
yadaharvvrgrhlttdllyevdgdvatgrsasvvtlataagykilgsgeyqdrlikqdg
qwriayrrlrndrlvsdpsvavnvadadvaavvghllaaarrlgtqmsd