7.3kb genomic fragment that encompasses αTub67C.
αTub67C+t7.3 rescues αTub67C1/αTub67CRX2.1
αTub67C+t7.3 rescues αTub67C3/αTub67CRX2.1
αTub67C+t7.3 rescues αTub67C3/αTub67C1