... an N-domain, and are thus five-domain proteinspossessing the catalytic (b /a) 8-barrel (domain A) and the four domains B, C, D and E. In the case of four-domainproteins without an N-domain, only ... possess a C-terminal starch-binding domain (SBD): a- amylase,maltotetraohydrolase, maltopentaohydrolase, maltogenic a- amylase, acarviose transferase, and cyclodextrin glu-canotransferase (CGTase). ... domains in addition todomain A, the catalytic (b /a) 8-barrel[1].Mostofthempossess a domain B that protrudes from the barrel between the third b-strand and third a- helix and varies greatly in length,...