>2rexB (B:) SEQRES residues grapqpvvarcklvlvgdvqcgktamlqvlakdcypetyvptvfenytacleteeqrvel slwdtsgspyydnvrplcysdsdavllcfdisrpetvdsalkkwrteildycpstrvlli gcktdlrtdlstlmelshqkqapisyeqgcaiakqlgaeiylegsaftseksihsifrta smlclnkpsplpqkspv