label: alpha-1,4-glucan glucosyltransferase (UDP-glucose donor) activity
label_lc: alpha-1,4-glucan glucosyltransferase (udp-glucose donor) activity
description: "Catalysis of the reaction: [(1->4)-alpha-D-glucosyl](n) + UDP-alpha-D-glucose = [(1->4)-alpha-D-glucosyl](n+1) + H+ + UDP."