The Use of Oligodeoxythymidylate-Cellulose in Isolating Messenger Ribonucleic Acid-Protein Particles and in Detecting Developmental Changes in the Composition of Rat Cerebral Polyribosomes

1977 ◽  
Vol 5 (4) ◽  
pp. 917-918
Author(s):  
RICHARD M. ELLIOTT ◽  
LOUIS LIM ◽  
ALAN N. DAVISON
Keyword(s):  
Ribonucleic Acid ◽  
Developmental Changes ◽  
Messenger Ribonucleic Acid ◽  
Acid Protein ◽  
Protein Particles

scholarly journals Developmental changes in the protein and ribonucleic acid components of rat brain messenger ribonucleic acid-protein particles isolated from free polyribosomes by oligo(dT)-cellulose chromatography

1980 ◽  
Vol 190 (1) ◽  
pp. 215-223 ◽  
Author(s):  
R M Elliott ◽  
A N Davison ◽  
L Lim
Keyword(s):  
Ribonucleic Acid ◽  
Protein Composition ◽  
Developmental Changes ◽  
Proteinase K ◽  
Messenger Ribonucleic Acid ◽  
Adult Rat ◽  
Acid Protein ◽  
Mean Size ◽  
Rat Forebrain ◽  
Protein Particles

A study has been made of the developmental changes that occur in the RNA and protein moieties of mRNA-protein particles isolated from newborn and adult rat forebrain free polyribosomes. mRNA-protein particles were isolated by oligo(dT)-cellulose chromatography from salt-washed polyribosomes dissociated by puromycin/0.5 M-KCl treatment as two fractions (E1 and E2) by using Tris/HCl/NaCl eluting buffers containing respectively 25 and 50% (v/v) formamide. Isopycnic centrifugation on CsCl gradients showed that the newborn-derived fractions E1 and E2 has buoyant densities of 1.48–1.50 and 1.41–1.43 g/cm3. Adult-derived E1 and E2 fractions had corresponding values of 1.47 and 1.42 g/cm3. The pooled mRNA-protein particles from the E1 and E2 fractions after deproteinization with proteinase K sedimented with a mean size of approx. 18 S on a sucrose gradient containing 85% formamide with little differences between mRNA molecules from newborn and adult. The mean lengths of the poly(A) segments were similar, being about 130 nucleotides long. Distinct changes were found in the protein composition of the mRNA-protein particles. Fractions E1 and E2 from the newborn contained two major proteins of mol.wts. 74 000 and 52 000 with differences in the relative proportions in each fraction. In contrast, adult fractions E1 and E2 contained predominantly the larger protein. However, the adult fraction E2 contained a more heterogeneous population of minor bands of proteins, including that of mol.wt. 52 000. The findings are discussed briefly in relation to other changes in the developing brain.

Developmental changes in the methylation of silkmoth follicular epithelial messenger ribonucleic acid

Biochemistry ◽  
1981 ◽  
Vol 20 (8) ◽  
pp. 2086-2091 ◽  
Author(s):  
Charles S. Morrow ◽  
James R. Hunsley ◽  
M. Kathryn Liszewski ◽  
Theodore W. Munns
Keyword(s):  
Ribonucleic Acid ◽  
Developmental Changes ◽  
Messenger Ribonucleic Acid ◽  
Follicular Epithelial

scholarly journals Developmental Changes in Human Fetal Testicular Cell Numbers and Messenger Ribonucleic Acid Levels during the Second Trimester

2007 ◽  
Vol 92 (12) ◽  
pp. 4792-4801 ◽  
Author(s):  
P. J. O’Shaughnessy ◽  
P. J. Baker ◽  
A. Monteiro ◽  
S. Cassie ◽  
S. Bhattacharya ◽  
...  
Keyword(s):  
Ribonucleic Acid ◽  
Developmental Changes ◽  
Second Trimester ◽  
Testicular Cell ◽  
Messenger Ribonucleic Acid ◽  
Cell Numbers
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