di-trans,octa-cis-undecaprenyl phosphate + UDP-alpha-D-galactose => alpha-D-galactosyl-di-trans,octa-cis-undecaprenyl diphosphate + UMP
di-trans,octa-cis-undecaprenyl phosphate + udp-alpha-d-galactose => alpha-d-galactosyl-di-trans,octa-cis-undecaprenyl diphosphate + ump