PF4 Kills Intraerythrocytic P. Falciparum. A) Platelet CD36 enables recognition of infected erythrocytes. B) Once bound to the erythrocyte, platelets release PF4 from their stores. C) PF4 subsequently lyses the parasite digestive vacuole, killing the parasites within.Engwerda and Good, Science. 338:1304 (2012). Image: K. Sutliff/Science. Used with permission by AAAS.