Multiple Choice
What is a PEST sequence in a protein?
A) a sequence where phosphorylation occurs at every serine and tyrosine
B) a sequence that confers resistance to cathepsin-mediated proteolysis
C) a sequence of phenylalanine-glutamate-serine-threonine that is found in many proteins with half lives less than 2 hours
D) a sequence that causes ubiquitination of the protein followed by degradation
E) none of the above
Correct Answer:

Verified
Correct Answer:
Verified
Q4: Assuming that ammonia serves as the source
Q5: Which of the following metabolites is elevated
Q6: In the nitrogen fixation process, which step
Q7: What are the products of the
Q8: In the regulation of glutamine synthetase
Q10: What are the commonly observed oxidation states
Q11: For the following transamination reaction, show the
Q12: Which of the following forms of
Q13: Which of the following is an essential
Q14: Which of the following amino acids is