>6btdA (A:) observed residues (from ATOM records)
mllqkereeivaygkkmissgltkgtggnisifnreqglvaispsgleyyetkpedvvil
nldgeviegerkpsseldmhliyyrkredinalvhthspyaktiaslgwelpavsyliaf
agpnvrcapyetfgtkqladaafegmidrravllanhgliagannikmaftvaeeiefca
qiyyqtksigepkllpedemenl