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Diagnostic Biosystems CALPONIN Calponin-1
Supplier: Diagnostic Biosystems PDM219
Multiple isoelectric variants of calponin have been identified but only two molecular weight isoforms exist (34kDa and 29kDa). Expression of the 29kDa form, I-calponin, is primarily restricted to muscle of the urogenital tract, whereas the higher molecular weight variant has been demonstrated in vascular and visceral smooth muscle. Calponin is a calmodulin, F-actin and tropomyosin binding protein, which is thought to be involved in the regulation of smooth muscle contraction. Calponin expression is restricted to smooth muscle cells and has been shown to be a marker of the differentiated (contractile) phenotype of developing smooth muscle.
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