the presence of the enzyme activity at the cell surface is indicated by the following findings : a ) suspensions of intact cells , as well as intact cell monolayers , glucosylate gelatinized collagen b ) glucose transfer is not due to udp-glucose hydrolysis and subsequent intracellular utilization of the free glucose c ) experiments using cell suspensions with known proportions of broken cells indicate that the glucosyltransferase activity is attributable to intact cells and not to contamination by intracellular enzymes from broken cells .
C0699040
cell surface
C0007634
cells