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- W1663008465 abstract "The nature of 6-phosphofructo-1-kinase isozyme pools in fetal, neonatal, young adult (3 months), and aged (30 months) rat hearts was studied using chromatographic and immunological techniques. Furthermore, the changing subunit composition of each isozyme pool was determined by sodium dodecyl sulfate-polyacrylamide gel electrophoresis on 6% slab gels and by immunoblotting with subunit-specific antibodies. Although all three subunit types were expressed in heart throughout life, total activity and the nature of the isozyme pools varied during neonatal development and in aged heart. In fetal heart, the complex tetramers containing all three subunits appeared to be the major isozyme types. As the heart matured to the young adult stage, the M-type subunit increased over 6-fold; whereas the changes in the other two subunits were considerably less. These data indicate that during neonatal heart maturation the isozymic pools progressively exhibited increased amounts of the tetrameric forms containing two or more M-type subunits. In aged heart relative to the young adult (3 months) heart, the total activity and proportion of M-type subunit in the isozymes were decreased; and consequently, the amounts of the M-rich isozymes were decreased. The shifts in the types of isozymes during heart maturation and subsequent aging were primarily due to changes in availability of the M-type subunit to participate in random assembly of the tetrameric isozymes." @default.
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- W1663008465 date "1986-12-01" @default.
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- W1663008465 title "Alteration of 6-phosphofructo-1-kinase isozyme pools during heart development and aging." @default.
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- W1663008465 doi "https://doi.org/10.1016/s0021-9258(19)76014-1" @default.
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