UASt regulates expression of amino acids 1-657, corresponding to Lasp-PB, but with the two nebulin repeat domains (amino acids A106-K171) deleted, and tagged at the N-terminus with Tag:FLAG and Tag:polyHis.
Scer\GAL4Mef2.PR-mediated expression of LaspΔNEB.L.Scer\UAS.T:Zzzz\FLAG,T:Zzzz\His6 cannot rescue the sarcomere length, thin filament length, myofibril diameter or flight phenotypes seen in Lasp1 mutants.