The occurrence of free vs. conjugated MHPG in non-human and human primate brain.

Abstract

It has been found that in the brain of the non-human primate (Macaca arctoides) MHPG occurs principally if not exclusively in the free rather than the conjugated form. It has also been found that in all areas of human brain examined MHPG is present in the free form rather than the conjugated form. The quantity of free MHPG present in various structures of human brain ranged from 46.4 to 69.8 microng/gm of tissue.