beta-D-galacturonosyl di-trans,nona-cis-dodecaprenyl phosphate + UDP => di-trans,nona-cis-dodecaprenyl phosphate + UDP-alpha-D-galacturonate
beta-d-galacturonosyl di-trans,nona-cis-dodecaprenyl phosphate + udp => di-trans,nona-cis-dodecaprenyl phosphate + udp-alpha-d-galacturonate