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To which of the following residues of the protein, the protein kinases do not add phosphate groups?(a) serine(b) cytosine(c) threonine(d) tyrosineThe question was asked by my school teacher while I was bunking the class.The query is from Cell Signaling Systems topic in section Cell Signaling and Signal Transduction of Cell Biology

Answer» RIGHT option is (b) cytosine

Easiest EXPLANATION: The protein kinases usually add phosphate groups to serine and threonine residues of their target proteins. A very IMPORTANT CLASS of kinases also adds phosphate groups to the tyrosine residues.


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