To determine the relationship between expression of basal markers p63/CK5 and luminal marker Her2/neu in the pathogenesis of basal-like breast cancer, MCF10DCIS.com subpopulations overexpressing CK5 were isolated from MCF10DCIS.com cells using a ZsGreen1 reporter plasmid [23] in which expression of the reporter is directed by the CK5 promoter (Fig. 2A). The gene discussed is ERBB2; the disease is breast cancer.