Fig. 1.

Quantitative Western blot results of the expression of smooth muscle SMB and SMA myosin heavy chain (MHC) and total myosin in SMB^(+/+) and SMB^(−/−) ileum [including nonmuscle (NM) myosin], antrum, and fundus with β-actin as loading control. **Arbitrary densitometric units. Protein expression of SMB MHC is switched to SMA MHC in SMB^(−/−) ileum, antrum. Expression of total myosin and NM myosin (ileum) remains the same in these tissues. Values are mean of percent protein [from SMB^(+/+) or SMB^(−/−) sample] of total protein [from SMB^(+/+) and SMB^(−/−) samples] ± SE. *P < 0.05, difference determined by t-test to be significant; n = 3 for all groups.