Htt103Q-mCherry and α-syn-EGFP are physically interacting. (A) Immunoprecipitation of α-syn-EGFP with an antibody against the EGFP tag pulled down Htt103Q-mCherry from dopaminergic neurons, showed by immunoblotting analysis. (B) Immunoblotting of Total, Triton-X soluble and Triton-X insoluble fractions of α-syn-EGFP and Htt103Q-mCherry from adult heads of flies co-expressing these two proteins. The levels of α-syn-EGFP and Htt103Q-mCherry in the insoluble fraction are higher when these proteins are co-expressed. Genotypes: (A) TH-GAL4, UAS-α-syn-EGFP/UAS-Htt103Q-mCherry. (B) α-Syn: sGMR-GAL4, UAS-α-syn-EGFP. Htt103Q: sGMR-GAL4, UAS-Htt103Q-mCherry. α-Syn/Htt103Q-mCherry: sGMR-GAL4, UAS-α-syn-EGFP/UAS-Htt103Q-mCherry.