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Endogenous TRX and epitope-tagged SNR1 proteins colocalize on salivary gland polytene chromosomes of third instar larvae. Merging of green and red signals representing SNR1 and TRX respectively, identify the sites (yellow bands at the bottom) where the two proteins colocalize. Arrows indicate colocalization of both proteins at 98D1, the site of the endogenous forkhead gene.
