Specificity:Recognizes human Dihydropyridine calcium channel, alpha-1 subunit as determined by Western Blot of membrane preparations (~210kD), Immunoprecipitation and functional tests. Reactive with L-type calcium channel alpha1 subunit. Specific for small cell carcinoma and neuroblastoma by FACS analysis. No interaction with squamous cell carcinoma or with cardiac calcium chanel isoform. Species Crossreactivity: rabbit, rat and mouse.