What Is a PEST Sequence in a Protein

question 9

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

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