Electrophoretic marker of differentiated human prostate secretory epithelial cells

Electrophoretic analysis of primordial human prostate epithelium, glandular secretory epithelium of prostate and other human tissues revealed a marker characteristic of differentiated secretory prostate cells. Being probably neither protein nor lipid in chemical nature, this marker reacted in a peculiar way with Amido Black 10B. The marker was shown to be present in prostatic secretory substance.