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Arginase expression and arginase activity in BAEC exposed to hypoxia for 24 hr. (a) Western blot for arginase 1 (Arg1) and arginase 2 (Arg2) normalized to β-actin in BAEC exposed to either normoxia (-) or hypoxia (2% O2, +) and with (+) or without ABH (-). (b) Arginase activity in BAEC, normalized to normoxia control. (c) Argl/β-actin levels and (d) Arg2/β-actin levels. N=4-6. *P < 0.01.
