2.1.1.319 2 S-adenosyl-L-methionine + [protein]-L-arginine = 2 S-adenosyl-L-homocysteine + [protein]-Nomega,Nomega-dimethyl-L-arginine 2.1.1.319 S-adenosyl-L-methionine + [protein]-L-arginine = S-adenosyl-L-homocysteine + [protein]-Nomega-methyl-L-arginine 2.1.1.319 S-adenosyl-L-methionine + [protein]-Nomega-methyl-L-arginine = S-adenosyl-L-homocysteine + [protein]-Nomega,Nomega-dimethyl-L-arginine