Unformatted text preview: Gal genes. Since Gal4 positively regulates, and Gal80 negatively regulated Gal1 expression, we have to figure out how these two gene products work together to achieve such regulation. Assuming that Gal4 and Gal80 act in series there are two formal possibilities: Model 1 is that Gal4 positively regulates Gal1 , and that Gal80 negatively regulates Gal4 ; the presence of galactose somehow inhibits Gal80 function thus releasing Gal4 to positively activate Gal1 expression. Model 2 is that Gal80 negatively regulates Gal1 , and Gal4 negatively regulates Gal80 ; here the presence of galactose positively activates Gal4 which in turn negatively regulates Gal80 , thus relieving inhibition of Gal1 expression....
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This note was uploaded on 11/05/2011 for the course BIOLOGY MCB2010 taught by Professor Jessicadigirolamo during the Fall '10 term at Broward College.
- Fall '10