... Val216 decides the substrate speci city of a- glucosidaseinSaccharomyces cerevisiaeKeizo Yamamoto1, Akifumi Nakayama2, Yuka Yamamoto1,* and Shiro Tabata11Department of Chemistry, Nara ... Matsuura, Y., Kusunoki. M., Harada, W. & Kakudo, M. (19 84)Structure and possible catalytic residues of Taka-amylase A. J. Bi ochem. 95, 697 –702.4. Nakajima, R., Imanaka, T. & Aiba, ... fromPierce Chemicals. La-Taq polymerase was purchased fromTakara Syuzo and restriction endonucleases and T4 DNAligase were from Takara S yuzo, or New En gland Biolabs.Reverse transcriptase was used...