an N-methylornithine lipid + S-adenosyl-L-methionine = an N,N-dimethylornithine lipid + S-adenosyl-L-homocysteine + H(+)
an n-methylornithine lipid + s-adenosyl-l-methionine = an n,n-dimethylornithine lipid + s-adenosyl-l-homocysteine + h(+)
an N-methylornithine lipid + S-adenosyl-L-methionine = an N,N-dimethylornithine lipid + S-adenosyl-L-homocysteine + H(+)
an n-methylornithine lipid + s-adenosyl-l-methionine = an n,n-dimethylornithine lipid + s-adenosyl-l-homocysteine + h(+)