Effect of S. mutans and S. oralis cells on RNase B glycoforms. Spent supernatants from RNase B-supplemented cultures of S. mutans ATCC 25175T (a) and S. oralis ATCC 35037T (b) were analyzed by MALDI-TOF MS with sinapic acid as the matrix. Man5, Man6, Man7, Man8, and Man9 indicate the Man5 to Man9 glycoforms of RNase B with m/z ratios of 14,899, 15,061, 15,224, 15,386, and 15,548, respectively. RNase A is the nonglycosylated form of the protein (m/z, 13,682).