>1xl3B (B:) observed residues (from ATOM records) arvsdveeqvnqylskvpeleqkqnvsellsllsnspnislsqlkaylegkseepseqfk mlcglrdalkgrpelahlshlveqalvsmaeeqgetivlgaritpeayresqsgvnplqp lrdtyrdavmgyqgiyaiwsdlqkrfpngdidsvilflqkalsadlqsqqsgsgreklgi visdlqklkefgsvsdqvkgfwqffs