Partial loss of function allele. Does not complement Sxlf1. Partially complements Sxl alleles that are defective in somatic function, suggesting that this allele retains some somatic function. Partially complements Sxlf2, an allele defective in germline function; heteroallelic females are semi-fertile and the ovaries do not contain any abnormal oocytes.
The failure of SxlfPRC1 to complement Sxlf1 shows that sequences proximal to coordinate 0 (coordinates according to FBrf0042036) are required for wild-type Sxl activity.