An early frameshift indel in the coding region of the PA isoform expected to produce a non-functional protein. The downstream open reading frame of the PB isoform is intact.
ATC
Ythdc1[+]/Ythdc1NP1 is an enhancer of abnormal sex-determination phenotype of Sxl[+]/SxlfP7B0, da3
SxlfP7B0, Ythdc1NP1 has abnormal sex-determination phenotype