Expression in fusion-competent cells is about 6 times higher than fusion-incompetent cells. Remains high until 8 hours of sexual development, and then slightly decreases. In the asexual development, the transcript level increases temporarily during the pre-aggregation stage (4 hours), and then returns to the basal level. Null cells have increased numbers of peripheral cells during sexual development. Indistinguishable from the wild-type cells with respect to the cAMP response.