Regulayion and signaling Flashcards
1
Q
Regulation
A
order out of chaos
2
Q
2 main categories of protrin regulation
A
1) protein activity
2) protein amount
3
Q
protein activity
A
activate or inactivate a protein that’s already made
4
Q
Protein amount
A
control the synthesis or degradation of a protein
5
Q
ex of protein activity
A
- allosteric inhibition
- covalent modification
-PHOSPHORYLATION
-methylation
-cleavage
6
Q
Kinase
A
an enzyme that transfers phosphate to an acceptor molecule
7
Q
Phosphatase
A
enzyme that removes phosphates
8
Q
ex of transcription repression
A
LAC operon
9
Q
What does the LAC operon do
A
encodes enzyme for lactose utilization
10
Q
why are these enzymes regulated by amount?
A
because the lactose is not a common nutrient for E.coli
