N-acetylglucosaminylproteoglycan beta-1,4-glucuronyltransferase activity; UDP-alpha-D-glucuronate:N-acetyl-alpha-D-glucosaminyl-(1->4)-beta-D-glucuronosyl-proteoglycan 4-beta-glucuronosyltransferase activity; heparan glucuronyltransferase II activity
xref:
EC:2.4.1.225; MetaCyc:2.4.1.225-RXN; RHEA:20908; Reactome:R-HSA-3656257 "Defective EXT1 (in EXT1:EXT2) does not transfer GlcA to heparan"; Reactome:R-HSA-3656267 "Defective EXT2 (in EXT1:EXT2) does not transfer GlcA to heparan"; Reactome:R-HSA-9036285 "Defective EXT1 (in EXT1:EXT2) does not transfer GlcA to heparan"; Reactome:R-HSA-9036289 "Defective EXT2 (in EXT1:EXT2) does not transfer GlcA to heparan"; reactome:R-HSA-2022856 "EXT1:EXT2 transfers GlcNAc to heparan"; reactome:R-HSA-2076392 "EXT1:EXT2 transfers GlcA to heparan"