Smooth muscle calponin is a multifunctional, thin filament-associated protein whose
expression is restricted to smooth muscle cell lineages in developing and postnatal tissues.
Although the physiology of smooth muscle calponin has been studied extensively, thecis-
elements governing its restricted pattern of expression have yet to be identified. Here we
report on smooth muscle-specific enhancer activity within the first intron of smooth muscle
calponin. Sequence analysis revealed a proximal consensus intronic CArG box and two …