Formalin-fixed, paraffin-embedded human Uterus stained with Calponin-1 Monoclonal Antibody (SPM169).
Immunofluorescence Analysis of PFA-fixed K562 cells labeling Calponin Calponin-1 Monoclonal Antibody (SPM169) followed by Goat anti-Mouse IgG-CF488 (Green). The nuclear counterstain is Redot.
Flow Cytometric Analysis of PFA-fixed K562 cells using Calponin-1 Monoclonal Antibody (SPM169) followed by Goat anti-Mouse IgG-CF488 (Blue); Isotype Control (Red)
SDS-PAGE Analysis of Purified Calponin-1 MAb (SPM169). Confirmation of Purity and Integrity of Antibody
Known Applications & Suggested Dilutions
Host / Ig Isotype
Mol. Weight of Antigen
Specificity & Comments
Multiple isoelectric variants of calponin have been identified, however only two molecular weight isoforms exist; a 34kDa form and a 29kDa form. 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. In Western blotting, this MAb reacts with only the 34kDa form of calponin in extracts of human aortic medial smooth muscle and is unreactive with fibroblast extracts of cultivated human foreskin. 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.