title: [Ratio of the amounts of the mRNA poly A+/poly A- fractions in the myocardium and the life span of mRNA poly A+].
abstract: Two mRNA fractions, poly A+ and poly A- were found in the rat heart muscle. They comprise 30 and 70% of the entire mRNA, respectively. The ratio of the mRNA poly A+ to poly A- in the myocardium does not change in physiological aging. According to the kinetics of labelled precursor incorporation into mRNA, the life span of the main mass of mRNA poly A+ in the myocardium is about 4 hours.
mesh_terms: D000375:Aging; D000818:Animals; D008297:Male; D009206:Myocardium / Q000032:analysis / Q000378:metabolism*; D011061:Poly A / Q000032:analysis / Q000378:metabolism*; D012333:RNA, Messenger / Q000032:analysis / Q000378:metabolism*; D051381:Rats; D013997:Time Factors
chemical_list: D012333:RNA, Messenger; D011061:Poly A
vernacular_title: Sootnoshenie kolichestiv fraktsiĭ iRNK poli A+/A- v miokarde i prodolzhitel'nost' zhizni poli A+ iRNK.