Western blot analysis of c-mpl, GPIIb,and GPIb expression in platelets isolated from normal (WT) and ▵neo▵HS (MUT) adult mice. In the left panel, the same filter was sequentially used to assay expression for c-mpl, GPIIb,and c-src, whereas in the right panel a separate filter was sequentially used to detect expression of GPIb and c-src. The c-src signal was used to verify equivalent sample loading.