FIG. 7.

Effects of Id1 on thymocyte positive selection in H-Y TCR transgenic mice. (A) Total thymocytes from littermates with indicated genotypes were analyzed by fluorescence-activated cell sorting. The numbers shown indicate the percentages of the subsets. Total thymic cellularity is shown in parenthesis. Male (M) and female (F) mice are as labeled. Eleven litters of mice were analyzed and identical results were obtained. The data shown are representative of analyses of one such litter. Histograms of anti-VαT3.70 staining of total thymocytes (B) or the CD3ɛ^hi population (C) represent HY-TCR expression. The percentage of HY-TCR-positive cells is shown on top of the gate.