>2nr3A (A:) observed residues (from ATOM records)
naealqlnstevrilgcliekqatnpetypltlnalviacnqktsrdpvmnltqgqvgqs
lralegrgltrlvmgsradrwehkvdkglelvpaqviltgllllrgpqtvselltrsnrm
hdfedseqvvhqlerliarglatlvprqsgqredrymhligdpedlqd