>3tt1M (M:) observed residues (from ATOM records)
divltqspaslavslgqratisckasqsvdydgdsymnwyqqkpgqppklliygasnles
giparfsgsgsgtdftlnihpveeedaatyycqqsnedpytfgggtkleikradaaptvs
ifppsseqltsggasvvcflnnfypkdinvkwkidgserqngvlnswtdqdskdstysms
stltltkdeyerhnsytceathktstspivksfnr