N,N-Dimethylornithine lipid

S-adenosyl-L-methionine:N-methylornithine-lipid N-methyltransferase; S-Adenosyl-L-methionine + N-Methylornithine lipid <=> S-Adenosyl-L-homocysteine + N,N-Dimethylornithine lipid

S-adenosyl-L-methionine:N,N-dimethylornithine-lipid N-methyltransferase; S-Adenosyl-L-methionine + N,N-Dimethylornithine lipid <=> S-Adenosyl-L-homocysteine + N,N,N-Trimethylornithine lipid