PMID-sentid	Pub_year	Sent_text		comp_official_name	comp_offsetprotein_name	organism	prot_offset
7162220-8	1982	The observation of mtDNA at a density of 1.69 g/cm3 indicates the presence, predominantly in older animals, of a subclass of mtDNA molecules with altered ethidium binding properties.	Ethidium	154-162	Cardiac mass QTL 3	Rattus norvegicus	48-51