Mobility of human red blood cells of different age groups in an electric field.

facts or to the unequal surface charges of different cells in the same blood sample has not been clear. While Ruhenstroth-Bauer6 has stated that red cells of the same donor display a practically uniform charge, Danon and Marikowsky7 have reported that young red blood cells migrate in an electric field more rapidly than do old cells of the same blood sample. In a preliminary study of the surface charge of the red blood cells of normal donors undertaken in order to establish the “normal range” we found a wide range of mobilities in each sample, which we were able to correlate with the age distribution of the cells. We assume that the density of red blood cells is correlated with the age of the cells as mentioned by others.844