Deletion of amino acids 300-360.
Cannot rescue cardiac defect or visceral defect of tinEC40 when expressed via Scer\GAL4twi.PB and Scer\GAL4Mef2.PR.
Scer\GAL4twi.PB, tinUAS.ΔHD, Scer\GAL4Mef2.PR fails to rescue tinEC40