6bp deletion (ATGCCG, nucleotides 461-466 of the Ptth-RF coding sequence) in the final exon. This deletes residues N154 and A155 and results in a V156I substitution.
A 6 bp deletion (ATGCCG) in the final exon of Ptth causes an in-frame deletion that replaces N154, A155, and V156 with an I.
Ptth8K1J mutants exhibit a 1-day delay in the developmental time from L1 to pupariation, as compared to controls.