petunidin + UDP-alpha-D-galactose => petunidin 3-O-beta-D-galactoside + UDP
petunidin + udp-alpha-d-galactose => petunidin 3-o-beta-d-galactoside + udp
petunidin + UDP-alpha-D-galactose => petunidin 3-O-beta-D-galactoside + UDP
petunidin + udp-alpha-d-galactose => petunidin 3-o-beta-d-galactoside + udp