. "Catalysis of the reaction: luteolin 7-O-[(beta-D-glucosiduronate)-(1->2)-(beta-D-glucosiduronate)] + UDP-alpha-D-glucuronate = H(+) + luteolin 7-O-[(beta-D-glucosiduronate)-(1->2)-(beta-D-glucosiduronate)] 4'-O-beta-D-glucosiduronate + UDP." . . "LDT" . "luteolin-7-O-diglucuronide 4'-O-glucuronosyltransferase activity" . "UDP-glucuronate:luteolin 7-O-diglucuronide-glucuronosyltransferase activity" . "UDP-glucuronate:luteolin-7-O-beta-D-diglucuronide 4'-O-glucuronosyltransferase activity" . "UDPglucuronate:luteolin 7-O-diglucuronide-4'-O-glucuronosyl-transferase activity" . "UDPglucuronate:luteolin-7-O-beta-D-diglucuronide 4'-O-glucuronosyltransferase activity" . "uridine diphosphoglucuronate-luteolin 7-O-diglucuronide glucuronosyltransferase activity" . .