Abstract
Haemoglobin mRNA isolated from EDTA-treated polyribosomes has an apparent molecular weight of 120000-180000 estimated by condensation with (3)H-labelled isoniazid after periodate oxidation. Analysis of the ribonuclease digests of isoniazid-labelled RNA by paper electrophoresis and column chromatography enables the amount of contaminating 18S, 7S, 5S and 4S RNA to be estimated, and a corrected molecular weight of globin mRNA as the acid is 161000 or 500 nucleotides in length. This molecule contains two groups of 3'-terminal sequences in equal yield; G-Y-A(6) and G-Y-A(7) in the ratio 3:2, and G-N(9-16)-Y-A(2) and G-N(9-16)-Y-N(3) in the ratio 3:2. The significance of these sequences is discussed in relation to the poly(A) content of globin mRNA, the specificity of the sequences, and possible function in processing and biosynthesis of mRNA.
MeSH Terms
Animals
Base Sequence
Binding Sites
Carbon Isotopes
Centrifugation, Density Gradient
Chromatography, DEAE-Cellulose
Chromatography, Ion Exchange
Electrophoresis, Paper
Electrophoresis, Polyacrylamide Gel
Globins
Isoniazid
Molecular Weight
Oligonucleotides/analysis
Pancreas
RNA, Messenger/analysis,isolation & purification
RNA, Ribosomal/analysis,isolation & purification
Rabbits
Reticulocytes/analysis,cytology
Ribonucleases
Ribonucleotides/analysis
Spectrophotometry
Spectrophotometry, Ultraviolet
Tritium
Chemicals
Carbon Isotopes
Oligonucleotides
RNA, Messenger
RNA, Ribosomal
Ribonucleotides
Tritium
Globins
Ribonucleases
Isoniazid
Authors & Affiliations
1 authors, click to expand affiliations / ORCID
Hunt J A
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31 references, click to expand
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