Function
Gal3-Gal80-Gal4 proteins of yeast comprise a signal transducer that controls the galactose-inducible Gal4-mediated transcription activation of GAL regulon genes. Gal3 and Gal4[1] are regulators of the rapid induction of the galactose system. In the absence of galactose Gal80[2] binds to Gal4 and prohibits it from activating transcription. In the presence of galactose, Gal3 binds to Gal80 to prohibit its inhibition of Gal4. For Gal4 details see
User:Amir Mitchell/Gal4
User: Wayne Decatur/Gal 4
Evans Gal4
DNA-protein interactions.
The Gal4 protein consists of a of identical subunits.
