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Biochim. Biophys. Acta · Apr 1978
Comparative StudyPolymorphism in fowl serum albumin. VII. Distribution and activity of free and membrane-bound polysomes in developing fowl liver.
- M L Chu, H M Jernigan, and M Fried.
- Biochim. Biophys. Acta. 1978 Apr 27; 518 (2): 298-307.
AbstractThe quantity and activities of membrane-bound and free polysomes in livers from chick embryos at successive stages of development were compared in cell-free protein-synthesizing systems. Membrane-bound polysomes increased 2-fold between 8 and 18 days of development, while total ribosome content remained constant. Free polysome activity also remained constant during this period, while that of membrane-bound (total--free) polysomes decreased, possibly because of an increase in ribonuclease activity in this fraction. Serum albumin biosynthesis occurred primarily on membrane-bound polysomes. With liver development, increased secretion of serum proteins may be correlated with synthesis of serum albumin on increasing numbers of membrane bound polyribosomes.
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