>1u91B (B:) observed residues (from ATOM records)
ritlkesgpplvkptqtltltcsfsgfslsdfgvgvgwirqppgkalewlaiiysdddkr
yspslntrltitkdtsknqvvlvmtrvspvdtatyfcahrrgpttlfgvpiargpvnamd
vwgqgitvtisststkgpsvfplapgaaaalgclvkdyfpepvtvswnsgaltsgvhtfp
avlqssglyslssvvtvpssslqtytcnvnhkpsntkvdkrvepksc