... the lack of domain B protruding out of the TIM barrel in the place of loop 3 connecting the b3-strand to the a3-helix [9,21]. Sharing domain B by rBATs and GH13 enzymes, and especially the sequence of ... extracellulardomain. The segments correspond, in fact, with some of the a-amylase family CSRs, namely the b-strandsb2, b3, b4 and b8 of the (b ⁄ a)8barrel domain, and forrBAT also with the ... subfamilytogether with the intermediary enzymes (Fig. 1). The overall arrangement of the tree is that the clusters of true rBAT and 4F2hc proteins are separated from eachother by the GH13 enzymes.All...