MSN and acute lymphoblastic leukemia: First, we immunoprecipitated the proteins with anti-moesin, and performed a lectin-blot using ALL and a western-blot developing with anti-moesin (Figure 4A), results showed that ALL recognizes 5 proteins with equivalent molecular weights in both cell subsets (150, 100, 80, 70 and 60-kDa) and an additional 45-kDa protein in CD4+ cells only.