>1xttB (B:) observed residues (from ATOM records)
plyvidkpitlhiltqlrdkytdqinfrknlvrlgrilgyeisntldyeivevetplgvk
tkgvditdlnniviinilraavplvegllkafpkarqgvigasrvpkdmdvyiyykkipd
irakvdnviiadpmiatastmlkvleevvkanpkriyivsiisseygvnkilskypfiyl
ftvaidpelnnkgyilpglgdagdrafg