. . . . "a protein-Nω-(ADP-D-ribosyl)-L-arginine"^^ . "N2-(ADP-D-ribosyl)-L-arginine"^^ . "a protein-N^ω-(ADP-D-ribosyl)-L-arginine"^^ . . "a protein-Nω-(ADP-D-ribosyl)-L-arginine"^^ .