Murine RGS-5 is up-regulated in insulinomas. RGS-5 mRNA expression in normal mouse organs (brain, spleen, pancreas, and liver) and a pool of isolated solid tumors from 30-week-old RIP1-Tag5 (RT5) mice was examined by Northern blot (A) or RT-PCR analysis (B). The graph represents data from 3 to 5 organ samples. Error bars in all histograms represent SDs.