. "Any process that modulates the frequency, rate or extent of glycogen (starch) synthase activity." . . "regulation of glycogen (starch) synthase activity" . "regulation of glycogen (starch) synthetase activity" . "regulation of UDP-glucose-glycogen glucosyltransferase activity" . "regulation of UDP-glucose:glycogen 4-alpha-D-glucosyltransferase activity" . "regulation of UDP-glycogen synthase activity" . "regulation of UDPG-glycogen synthetase activity" . "regulation of UDPG-glycogen transglucosylase activity" . "regulation of UDPglucose:glycogen 4-alpha-D-glucosyltransferase activity" . "regulation of uridine diphosphoglucose-glycogen glucosyltransferase activity" . . . .