May play an important role in the terminal differentiation. Expressed throughout growth and development and shows increased levels during the post aggregation stages. Abundantly expressed when fruiting body formation is close to completion. Cells have tip formation delayed by 3 to 4 hours and complete development with normally shaped fruiting bodies only after 26-27 hour. Cells are able to form normally shaped mature fruiting bodies, however with a lower number of produced spores. In the N-terminal section; belongs to the BMP lipoprotein family. In the C-terminal section; belongs to the G-protein coupled receptor 3 family. GABA-B receptor subfamily.