Tissue distribution of mRNA for mouse M-Ras. (A) Northern blot of a multiple tissue [2 μg of mouse poly(A)+ RNA per lane] (Clontech) was hybridized with a ³²P-labeled mouse M-Ras cDNA probe. The size of the mRNAs detected are indicated to the left of the panel. (B) Northern blots containing 10 μg per lane of total RNA from adult tissues of FVB mice or IL-9–transgenic mice (Tg5) were hybridized with a ³²P-labeled mouse M-Ras cDNA probe. Ethidium bromide staining of the gel is shown as control for loading.