The Hsp70 promoter drives expression of amino acids 85-1-39 of msl-1. Also has 4 extra amino acids PNSS at the C terminus.
partially lethal - majority die | male limited
There is a significant loss of male viability (about 1/2 of expected males survive) in homozygous mutants where expression of msl-1Δ84.hs in induced by heatshock.