P-A1-30 Residues in cyclodextrin glycosyl transferase that determine product specificity: Uitdehaag J.C.M.1, Penninga D.2, Alebeek G.2, van der Veen B.2, Rozeboom H.1, Kalk K.H.1, Dijkhuizen L.2, Dijkstra B.W.1 1 Bioson Research Institute, University of Groningen (NL) 2 Department of Microbiology, University of Groningen (NL)