title: Mechanisms of ageing.
mesh_terms: D000225:Adenine / Q000378:metabolism; D000375:Aging; D003596:Cytosine / Q000378:metabolism; D005815:Genetic Code; D005826:Genetics, Medical; D006147:Guanine / Q000378:metabolism; D006801:Humans; D013941:Thymine / Q000378:metabolism
chemical_list: D006147:Guanine; D003596:Cytosine; D000225:Adenine; D013941:Thymine