Protein phosphorylation is a post-translational modification of proteins, was first reported in 1906 by which American biochemist who studied the structure and function of nucleic acids, at the Rockefeller Institute for Medical Research?
Protein phosphorylation:  Protein phosphorylation was first reported in 1906 by Phoebus Levene at the Rockefeller Institute for Medical Research with the discovery of phosphorylated vitellin. Phoebus Levene: Phoebus Aaron Theodore Levene, M.D. (25 February 1869 – 6 September 1940) was an American biochemist who studied the structure and function of nucleic acids.
Phoebus Aaron Theodore Levene