POLYMORPHISM IN FOWL SERUM-ALBUMIN .7. DISTRIBUTION AND ACTIVITY OF FREE AND MEMBRANE-BOUND POLYSOMES IN DEVELOPING FOWL LIVER

被引:3
作者
CHU, MLH [1 ]
JERNIGAN, HM [1 ]
FRIED, M [1 ]
机构
[1] UNIV FLORIDA,COLL MED,DEPT BIOCHEM,GAINESVILLE,FL 32610
关键词
D O I
10.1016/0005-2787(78)90186-7
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
The 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 polyribosome 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. © 1978.
引用
收藏
页码:298 / 307
页数:10
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