The native Apc2 promoter drives expression of Apc2 containing mutations in the phosphorylation sites of the both the SAMP1 and SAMP2 motifs (carries the amino acid replacements S933A, S935A, S936A, S938A, S941A, S949A, S962A, S965A, Y997A, S998A, S102A, S112A, S114A, S122A, S127A, S133A). The protein is tagged with GFP.