>3tnnF (F:) observed residues (from ATOM records)
altqpasvsgspgqsitisctgtssdvgsynfvswyqqhpgkapklmiyevserpsgisn
rfsgsksgntasltisglqaedeadyycssyagsttfrvfgggtkltvrgqpkaapsvtl
fppsseelqankatlvclisdfypgavtvawkadsspvkagvetttpskqsnnkyaassy
lsltpeqwkshrsyscqvthegstvektvapt