MUC1 and colon carcinoma: To investigate whether this relationship between MUC1 mRNA and intrinsic Δψm extended to MUC1 C-ter protein levels, mitochondrial (mt) and accompanying Post Mitochondrial (PMF) enriched fractions were isolated from the SW620 colonic carcinoma cell population and from subcloned lines derived from SW620 cells with a range of relative intrinsic Δψm [1].