Which of the Following Amino Acid Residues of the PDH

Question

Which of the following amino acid residues of the PDH complex is the target of phosphorylation?
A)serine of E1
B)tyrosine of E1
C)serine of E2
D)tyrosine of E2

Accepted Answer

The serine residue of the E1 subunit (E₁) of the PDH complex is the target of phosphorylation. This modification regulates the activity of the complex.