ID   2.1.1.44
DE   Dimethylhistidine N-methyltransferase.
CA   S-adenosyl-L-methionine + N(alpha),N(alpha)-dimethyl-L-histidine =
CA   S-adenosyl-L-homocysteine + N(alpha),N(alpha),N(alpha)-trimethyl-L-
CA   histidine.
CC   -!- Methylhistidine and histidine can also act as methyl acceptors, with
CC       trimethylhistidine being formed in both cases.
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