... 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 ... oligo-1,6-glucosidase)in region II of the b4-strand; and (c) more or less the entire region VII, i.e. the b8-strand. The fact thatrBATs exhibit more sequence similarities with the GH13 enzymes than the 4F2hc proteins ... 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 short stretch...