May act as a lysosomal receptor (By similarity). May be involved in macropinocytosis and fluid phase exocytosis. Localizes to membranes of endolysosomal vesicles and macropinosomes. Shows a bi-phasic developmental regulation. Present in growth phase cells as well as in early aggregating cells, but the levels drop significantly during the slug stage. Protein levels rise again at later multicellular stages of the development to higher amounts than in growth phase cells, and the protein is still detectable in significant amounts in fully developed fruiting bodies (at protein level). Heavily glycosylated. Belongs to the CD36 family.