The Effect of Prostaglandin F_2α on Mitochondrial Election Dense Inclusions and Secretory Granules of the Bovine Large Luteal Cell During Late Pregnancy

Abstract

The bovine corpus luteum has been shown to contain two populations of electron dense granules which are morphologically distinct (Fields et al., 1985). One population consists of small (100–300 nm diameter) membrane bounded granules that are readily observed to undergo exocytosis (Singh, 1975; Heath et al., 1983; Fields et al., 1985). The product of these small luteal granules has not been identified in the pregnant cow. However, in the nonpregnant cow luteal secretory granules have been shown to contain oxytocin associated neurophysin (Fields and Fields, 1986).