Mutant/mutation
The mutant lacks expression of PSOP13 (putative secreted ookinete protein 13)

Protein (function)
Unknown. The protein is detected in a proteome analysis of ookinetes and contains a predicted signal sequence

Phenotype
Phenotype analyses indicate a role during oocyst development and sporozoite formation/production (see also additional information)

Additional information
Crossings of the mutant females with wild type males did not rescue the formation/production of sporozoites. Crossing of the mutant males with wild type females resulted in wild type production of sporozoites that were infectious to C57BL/6 mice.
Crossings between other mutants have shown that wild type males can rescue defects in females that affect ookinete invasion and traversal of the midgut wall at 18-30 hours after fertilisation. The lack of rescue of the ∆psop13 mutant phenotype by crossing of mutant females with wild type males is suggestive of a role of PSOP13 within a few hours after fertilisation.