Distribution of the endomucin RNA expression. Northern blot analysis of endomucin. Northern blot containing RNA from various mouse tissues (as indicated) with 2 μg Poly(A)⁺ RNA per lane was hybridized with the ³²P-labeled endomucin cDNA probe (A) or a probe for β-actin (B) as a control. Positions of size markers (in kilobases) are shown on the left.