The Histochemical Recognition of Phenols, especially Tyrosine

Abstract

Sections of tissue embedded in collodion are heated in an acidified aqueous solution of mercuric sulphate and sodium nitrite. A red colour denotes the presence of phenols (generally the tyrosine of proteins). The reagent is more rational than Millon's and most of the modifications of his method used up till now in histochemistry. It gives a particularly strong coloration.