. "\"Any process that activates or increases the frequency, rate or extent of the covalent alteration of one or more amino acid residues within a protein.\" [GOC:mah, GOC:tb]" . . "positive regulation of protein modification process" . "up regulation of protein modification" . "up-regulation of protein modification" . "upregulation of protein modification" . . . "activation of protein modification" . "stimulation of protein modification" .