title: Stage-specific production of S-antigens of Plasmodium falciparum in vitro.
abstract: Stage-specific synthesis and release of the S-antigen of Plasmodium falciparum was demonstrated using 3H-glycine-labelled, synchronous, cloned parasite populations. The release of S-antigens into culture supernatants was first evident 25 to 30 hours after initiation of the parasite cycle and correlated with the rupture of the most mature schizonts. S-antigen release reached a peak at 37 to 43 hours at the height of the reinvasion cycle. Intracellular production of S-antigens was evident slightly earlier (19 to 24 hours) and correlated with the initial appearance of schizonts.
mesh_terms: D000818:Animals; D000941:Antigens / Q000032:analysis*; D019393:Arrestin; D004591:Electrophoresis, Polyacrylamide Gel; D010963:Plasmodium falciparum / Q000254:growth & development / Q000276:immunology*; D013997:Time Factors
chemical_list: D000941:Antigens; D019393:Arrestin