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RGS5 protein is up-regulated in asthmatic ASM cells. (A) Expression of RGS5 in asthmatic and nonasthmatic ASM cells was evaluated by immunoblotting. (B) Relative expression of RGS5 in control and asthmatic ASM cells was determined by densitometry (mean ± SEM of four control donors and three donors with asthma, normalized to β-actin). **P = 0.003, unpaired t test.
