The phosphorylation of a protein is typically associated with a change in activity, the assembly of a protein complex, or the triggering of a downstream signaling cascade. The addition of ubiquitin, a small polypeptide, is another type of covalent modification that can affect the protein function. Ubiquitylation often results in ______________.
(a) membrane association.
(b) protein degradation.
(c) protein secretion.
(d) nuclear translocatiBiologyon.
Answer: B