Expression of cyclin A, p27Kip1, and p21Cip1 in adherent and nonadherent 32D or 32Dp210 cells. Cells were seeded on fibronectin-coated dishes. Cell extracts from adherent and nonadherent fractions were prepared 20 hr after seeding. Extracts containing 12.5 μg of protein were separated on a 12.5% polyacrylamide gel, and cyclin A, p27Kip1, and p21Cip1 were detected by immunoblotting and enhanced chemiluminescence.