Methylates (mono and asymmetric dimethylation) the guanidino nitrogens of arginyl residues in ribosomal protein rps2. Interacts with ef1a-c, rps2 and rps24. Note=Associates with the 40S ribosomal particle. Belongs to the class I-like SAM-binding methyltransferase superfamily. Protein arginine N-methyltransferase family.