sev enhancers and an Hsp70 promoter drive expression of a truncated form of csw in which the entire tail region (amino acids 650 to 841) has been deleted.
wild-type
cswΔtail.hs.2sev rescues csw13-87
cswΔtail.hs.2sev rescues cswG547E.hs.2sev
Rescues the zygotic lethality of csw13-87/Y males. Also has maternal csw+ function; homozygous females carrying cswhs.2sev produce wild-type progeny.