Western blot analysis showing the effect of various types of laminin (LN) on (A) desmin and (B) calponin protein abundance. HASM cells were seeded onto plastic or laminin (10 μg/ml)-coated dishes and then serum deprived for 7 days. EHS = laminin from Engelbreth-Holm-Swarm murine sarcoma; β1 = affinity purified β1 chain-laminin from human placenta that includes LN-1, 2, 6, 8, 10; α2 = affinity purified α2 chain-containing laminin from human placenta that includes LN-2 and 4. Grouped data represent results obtained from at least four different cultures. *P < 0.05, compared with Day 0 on plastic.