si_0429 Type_I_Restriction-Modification Type I restriction-modification system, restriction subunit R (EC 3.1.21.3) si_0429 Type_I_Restriction-Modification Type I restriction-modification system, DNA-methyltransferase subunit M (EC 2.1.1.72) si_0429 Type_I_Restriction-Modification Type I restriction-modification system, specificity subunit S (EC 3.1.21.3)