SEARCH Articles Figures Tables ATPase calponin Absence of Calponin Phosphorylation during Smooth Muscle Contraction Actin calponin-specific filaments Calponin actomyosin ATPase inhibition Calponin localization Calponin phosphorylation Calponin protein interactions Calponin tissue specificity Calponin with Other Proteins Role of calponin in the thin filament