Serine and formaldehyde as metabolic precursors for the nicotine N-methyl group.
D005557:Formaldehyde / Q000378:metabolism*; D006801:Humans; D009538:Nicotine / Q000378:metabolism*; D012694:Serine / Q000378:metabolism*
D005557:Formaldehyde; D012694:Serine; D009538:Nicotine
FORMALDEHYDE/metabolism; NICOTINE/metabolism; SERINE/metabolism