label: histone H3K4 dimethyltransferase activity
label_lc: histone h3k4 dimethyltransferase activity
description: "Catalysis of the reaction: L-lysyl4-[histone H3] + 2 S-adenosyl-L-methionine = 2 H+ + N6,N6-dimethyl-L-lysyl4-[histone H3] + 2 S-adenosyl-L-homocysteine. This reaction is the successive addition of two methyl groups to the unmethylated lysine residue at position 4 of histone H3, producing histone H3K4me2."