Asparagine content of P. falciparum stage-specific proteins. Stage-specific proteome data were retrieved from the study by Florens and collaborators (19). They correspond to four distinct stages of the parasite: sporozoites, merozoites, trophozoites, and gametocytes. A, asparagine frequencies were compared in stage specific proteins; B, asparagine repeats were sorted according to their length: five to nine consecutive residues (light gray), 10 to 19 residues (dark gray), and >20 residues (black).