>2tunB (B:) SEQRES residues vrsssrtpsdkpvahvvanpqaegqlqwlnrranallangvelrdnqlvvpseglyliys qvlfkgqgcpsthvllthtisrivvsyqtkvnllsaikspcqretpegaeakpwyepiyl ggvfqlekgdrlsaeinrpdyllfaesgqvyfgiial