Distribution of oxidases in the testis of buffalo, goat and ram: an histochemical study

Peroxidase, monoamine oxidase (MAO) and cytochrome oxidase (CCO) have been histochemically localized in the testis of buffalo, goat and ram. The results in these three species were more or less similar. Peroxidase was localized only in the interstitial tissue and could be used as a marker enzyme for this testicular compartment. MAO and CCO were present in both the interstitial tissue and the seminiferous tubules. The detailed patterns of MAO and CCO distribution were also similar and showed cyclic changes in the spermatids which have not been reported before. The results have been compared and contrasted with those of previous workers and their possible physiological significance discussed.