The chemical composition of these side chains both with respect to components and arrangement of the different sugars determines the nature of the somatic or O antigen determinants , which are essential means of serologically classifying many Gram-negative bacteria .
The chemical composition of these side chains both with respect to components as well as arrangement of the different sugars determines the nature of the somatic or O antigen determinants , which are essential means of serologically classifying many Gram-negative bacteria .