ID 2.1.1.143 DE 24-methylenesterol C-methyltransferase. AN 24-methylenelophenol C-24(1)-methyltransferase. AN SMT2. CA 24-methylidenelophenol + S-adenosyl-L-methionine = (Z)-24- CA ethylidenelophenol + H(+) + S-adenosyl-L-homocysteine. CC -!- This is the second methylation step of plant sterol biosynthesis (cf. CC EC 2.1.1.142). DR Q39227, SMT2_ARATH ; O82427, SMT2_ORYSJ ; Q94JS4, SMT3B_ARATH; //