Figure 4

Representative diagram of the proposed effect of the concurrent synthesis of HSD and cytochrome P450 _scc on the intracellular distribution of HSD in luteal cells. Initiated by LH; the transcription of HSD mRNA and P450_scc mRNA results in the simultaneous production of HSD and P450_scc. The two enzymes bind to each other to form a complex, which is then inserted into the inner mitochondrial membrane. Molecules of HSD that do not bind to P450_scc are inserted into the membrane of the endoplasmic reticulum.