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A protein is phosphorylated at a serine residue. A phosphomimic mutant of the protein can be generated by substituting that serine with
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- glycine
- alanine
- aspartate
- threonine
Correct Option: C
To investigate the effect of serine 78 phosphorylation on p21 activity, replacement of serine 78 with aspartic acid is done, creating the phosphomimic p21s78D.