Plays an essential role in male gamete fertility (By similarity). Required for the binding to erythrocytes and thus, for the formation of exflagellation centers (By similarity). Present on the surface of male gametocytes. Specifically presents on the surface of stage V male gametocytes (at protein level) (PubMed:12106866, PubMed:30297725). Not expressed in gametes or asexual parasites (PubMed:12106866). Expression peaks in stage III/IV gametocytes, then sharply declines in gametes (PubMed:12106866). In P.berghei, dispensable for male gamete attachment to erythrocytes and the formation of exflagellation centers.