The quantitative histochemistry of ribonucleic acid using gallocyanin.

A method for the cytophotometric estimation of ribonucleic acid in tissue sections using gallocyanin-chrome alum is described. The dye obeys Beer's law in gelatin sections. The effect of deoxyribonuclease on the staining of ribonucleic acid is also investigated. The results indicate that this method is of value in the quantitation of ribonucleic acid.