title: Sensitive detection of 5-methylcytosine and quantitation of the 5-methylcytosine/cytosine ratio in DNA by gas chromatography--mass spectrometry using multiple specific ion monitoring.
mesh_terms: D000818:Animals; D002417:Cattle; D002849:Chromatography, Gas; D003596:Cytosine / Q000031:analogs & derivatives* / Q000032:analysis*; D004247:DNA / Q000032:analysis*; D005260:Female; D008297:Male; D013058:Mass Spectrometry; D008722:Methods; D008745:Methylation; D051379:Mice; D012474:Salmon; D013094:Spermatozoa / Q000032:analysis; D013950:Thymus Gland / Q000032:analysis
chemical_list: D003596:Cytosine; D004247:DNA