PMID: 6165381Apr 28, 1981Paper

Immunoglobulin mu- and gamma-ribonucleic acid sequences in thymocytes and splenocytes from normal and hyperimmune mice

Biochemistry
R I Near, U Storb

Abstract

The immunoglobulin heavy-chain ribonucleic acid (RNA) repertoire of mouse thymocytes was examined. Previously, this laboratory reported immunoglobulin alpha-chain RNA sequences in mouse thymocytes [Near, R. I., & Storb, U. (1979 Biochemistry, 18, 964]. We have extended these studies to encompass mu, gamma 2b, and gamma 1 heavy-chain RNA sequences, mu-, gamma 2b-, and gamma 1-messenger RNAs (mRNAs) were purified from myelomas to 45, 22, and 54% purity, respectively. Each of these mRNAs faithfully translated into the appropriate immunoprecipitable protein in a reticulocyte lysate translation system. The gamma 1-mRNA translated into two major immunoprecipitable products of about 52 500 and 51 000 daltons while mu- and gamma 2b-mRNAs yielded only a single major protein. Complementary deoxyribonucleic acids (cDNAs) prepared from the mRNAs were used as hybridization probes and revealed the presence of about 70 mu-RNA sequences per average thymocyte as determined by hybridization kinetics, while gamma 1 and gamma 2b sequences were at the limits of detection. The mu-RNA sequences are present in the cytoplasm and are greater than 50% polyadenylated. Upon hyperimmunization of mice with sheep red blood cells, gamma 1-RNA in splenocytes in...Continue Reading

References

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Citations

May 1, 1982·Proceedings of the National Academy of Sciences of the United States of America·M C ZüñigaN H Ruddle
Dec 16, 1982·Nature·J C Jensenius, A F Williams

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