Western blot analysis of Nup62 and Sm proteins during erythropoiesis. Western blot analysis of FVA-cell lysates obtained from cells cultured from 0 hour to 43 hours. Gel lanes were loaded with equivalent cell numbers and blot probed with (A) mAb414 against Nup62 and (B) anti-Sm. Immunoreactive bands of Nup62 and Sm were observed at 62 kDa and 29 kDa, respectively; no apoptotic cleavage products were detected.