methylator
/ˈmɛθɪleɪtə/noun
1A person or company engaged in the production of methylated spirits.
2 Chemistry and Biology. A chemical compound or drug that is a methylating agent or methyl group donor; an organism, tumour, or cell that is capable of carrying out a specific type of metabolic methylation reaction.
Origin
Late 19th century; earliest use found in Acts of Parliament. From methylate + -or.