3.3.1.1 adenosylhomocysteinase - 3.3.1.2 S-adenosyl-L-methionine hydrolase (L-homoserine-forming) - 3.3.1.3 ribosylhomocysteinase transferred to EC 3.2.1.148 3.3.1.B1 inosylhomocysteinase preliminary BRENDA-supplied EC number