An Ubi-p63E promoter drives expression of β-Spec, in which the sequences coding for repeats 4-11 have been replaced with sequences coding for repeats 2-9 of the α-Spec protein. The construct is tagged with Tag:MYC.
Expression of α-Spec::β-Specα2-9.Ubi-p63E.T:Hsap\MYC fails to rescue β-Specem21 mutants.