Construct: Gap1 deleted for the C2a domain is expressed from a sev enhancer/promoter cassette.
RasGAP1ΔC2a.sev partially rescues RasGAP1B2
RasGAP1ΔC2a.sev fails to rescue RasGAP1S1-11
Shows 50% rescue of the Gap1B2 mutant phenotype.