Figure 3

Immunohistochemistry analysis of stained sections of the spleen of rats belonging to the control group and the groups fed Nigella sativa seeds (30 g/kg and 50 g/kg). The percent area of splenocytes showing positive caspase-3 protein expression is shown (arrow, ×10 & ×200 magnification). The mean percentage of positive caspase-3 reactivity is shown in the histogram. Different superscript letters indicate significant differences at P < 0.05.