>1s8fA (A:) observed residues (from ATOM records)
sslfkvillgdggvgksslmnryvtnkfdtqlfhtigveflnkdlevdghfvtmqiwdta
gqerfrslrtpfyrgsdcclltfsvddsqsfqnlsnwkkefiyyadvpesfpfvilgnki
diserqvsteeaqawcrdngdypyfetsakdatnvaaafeeavrrvla