The Hsap\SOD1 coding sequence has been mutated (carries the amino acid replacement A4V).
Hsap\SOD1A4V.Sod is a suppressor | partially of short lived phenotype of Sod1X-16/Sod1X-39
The addition of Hsap\SOD1A4V.Sod partially suppresses the reduced life-span phenotype of SodX-16/SodX-39 having an average 17-19% recovery of life span. These flies however, do not show a progressive age-related decrease in walking speed, instead these flies maintain the same motor ability as controls until 12 days of age, after which they show a rapid decline at approximately the age at which increased mortality rates are first observed. Female fertility is also initially unimpaired but subsequently undergoes a sharp decline. Flies are also normal in their response to oxidative challenge.