5-methylcytosine is formed by the action of DNA methyltransferase[?] on CpG sites. It can undergo spontaneous deamination to form thymine.
... of[?] Acyl-CoA dehydrogenase, short chain, deficiency of[?] Acyl-CoA dehydrogenase, very long chain, deficiency of[?] Acyl-CoA oxidase deficiency[?] ...