Gal Operator

Question 1

What is the purpose of Gal?

Answer 1

Helps galactose to be uptaken in yeast

Question 2

Gal Operon

Answer 2

1) If no gal available Gal4p binds active site but gal80p masks activity 2) gal3p constitutive co-activator; when galactose present, gal3p relieves gal80p 3) now gal4 can interact with co-activator SAGA

Question 3

Gal 80

Answer 3

binds gal4P to keep gal 80 from doing its action

Question 4

Gal 3P

Answer 4

binds to gal80 to deactivate it. gal4p good to do its action