∞ generated and posted on 2016.01.18 ∞
Sugars indirectly attached through the core sugars to lipid A in LPS.
The 'O' of O polysaccharide is also the 'O' of of .
See also the concept of 'serovar, i.e., as with E. coli O157:H7 representing a serovar of E. coli.