the identification of the antigenic determinant as a carbohydrate was based on three observations : ( i ) interaction with a mannan preparation from the same organism , ( ii ) sensitivity of the antigen to periodate but not proteases , and ( iii ) coincidence of the migration of antigen during electrophoresis with material which stained intensely with carbohydrate but not with protein reagents .
C0003316
antigenic determinant
C0003320
antigen