Inosine protects A3R^+/+ liver tissue from ConA-induced damage in vivo. Tissue sections of liver taken from A3R^+/+ (A-C) and A3R^-/- (D-F) mice 24 hours after injection with ConA (A,D), inosine (B,E), and ConA plus inosine (C,F) were stained with haemotoxylin and eosin (H&E). This figure shows that inosine protected A3R^+/+, but not A3R^-/-, liver from ConA-induced damage. Original magnification, × 10.