from a large library of independent mutants created by tn5 transposon mutagenesis , mutants were isolated which lacked reactivities with mab 1604 ( a mab specific for a cell surface protein ) and mabs 2600 , 1733 , 1514 , 1412 , and 783 ( mabs specific for carbohydrate epitopes on the o antigen of lipopolysaccharide [ lps ] ) .
C0069180
o antigen
C0023810
lipopolysaccharide