Demonstration of the Properties A,B,M,N and Rh in Red-Cell Stromata. ∗

Summary

From 250 cc of packed erythrocytes approximately 10 cc of red-cell stromata can be obtained. The titers of the group substances, A, B, and Rh, in the stromata are almost proportionately higher than the corresponding titers of the original erythrocytes. However, the calculated rise in titer was not obtained for properties M and N, suggesting that these may have been damaged by the processing of the cells. The possible use of red-cell stromata for treating sensitized Rh-negative individuals is discussed.