. "Any process that stops, prevents or reduces the rate of addition of phosphate groups to amino acids within a protein." . . . . "negative regulation of protein phosphorylation" . "down regulation of protein amino acid phosphorylation" . "down-regulation of protein amino acid phosphorylation" . "downregulation of protein amino acid phosphorylation" . "inhibition of protein amino acid phosphorylation" . "negative regulation of protein amino acid phosphorylation" . . . . . . . . . . .