a mutant of s. montevideo called sl5222 that inserts galactose only into core oligosaccharide and mannose only into o-antigen subunits was grown with [ 3h ] mannose and [ 14c ] galactose , so that lps molecules bearing large numbers of o-antigen subunits have high 3h to 14c ratios , whereas molecules with few o-antigen subunits have lower 3h to 14c ratios .
C0023810
lps
C0069180
o-antigen