Phosphorylation of which amino acid does not occur by protein kinase -
Ans. is 'a' i.e., Aspargine Protein kinase mostly add phosphoryl group to a serine, threonine, or tyrosine residues. Some protein kinase target the side chains of histidine, lysine, arginine, aspaic acid and glutamic acid.
Aspargine
Threonine
Serine
Tyrosine