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  • Title: Cytosolic glutamine synthetase in higher plants. A comparative immunological study.
    Author: Hirel B, McNally SF, Gadal P, Sumar N, Stewart GR.
    Journal: Eur J Biochem; 1984 Jan 02; 138(1):63-6. PubMed ID: 6141048.
    Abstract:
    Cytosolic glutamine synthetase (GS1) was purified to homogeneity from etiolated barley leaves by DEAE-Sephacel and hydroxyapatite chromatography, gel filtration and polyacrylamide gel electrophoresis. Specific antibodies against the purified protein were raised by the immunization of rabbits. Immunoprecipitation experiments demonstrated that cytosolic glutamine synthetases isolated from the leaves of different plant species were very similar proteins. Good recognition of other cytosolic glutamine synthetases from roots, root nodular tissue and seeds by barley GS1 antibodies was obtained, suggesting that they too are all quite similar proteins. In contrast, chloroplast glutamine synthetase (GS2) was considered to be a different protein in view of its low level of recognition by barley GS1 antibodies.
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