>2r4zA (A:) observed residues (from ATOM records)
svydaaaqltadvkkdlrdswkvwgsdkkgngvalmttlfadnqetigyfkrlgdvsqgm
andklrghsitlmyalqnfidqldnpddlvcvvekfavnhitrkisaaefgkingpikkv
lasknfgdkyanawaklvavvqaal