UASt regulatory sequences drive expression of 'Camuiα' a fluorescence resonance energy transfer (FRET)-based reporter of CamKII kinase activity. 'Camuiα' (GenBank:AY928551) consists of the entire Rnor\Camk2a coding sequence tagged at the N-terminal end with Venus and at the C-terminal end with a cyan fluorescent protein that has enhanced brightness (carries the S175G mutation). Upon activation, the Rnor\Camk2a protein in Camuiα undergoes a conformational change that reduces FRET between the two fluorophores; this FRET change reflects calmodulin binding and autophosphorylation at residue T286 (details from PMID:15788767).