Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
. 1987 Feb;83(2):259-61.
doi: 10.1104/pp.83.2.259.

Glutamine Synthetase Isoenzymes in the Green Soil Alga Stichococcus bacillaris Naeg

I Ahmad  1 , J A Hellebust
Affiliations

Glutamine Synthetase Isoenzymes in the Green Soil Alga Stichococcus bacillaris Naeg

I Ahmad et al. Plant Physiol. 1987 Feb.

Abstract

Two forms of glutamine synthetase (GS(1) and GS(2)) have been separated from cells of Stichococcus bacillaris by fast protein liquid chromatography. The activities of the two isoenzymes were influenced by the composition of the media employed; thiol reagents were essential for stabilizing GS(2) but they suppressed GS(1) activity. The activity of each isoenzyme was, therefore, determined following separate purification procedures. Growth conditions influenced both isoenzymes; GS(2) showed maximum activity under photoautotrophic conditions, whereas GS(1) showed maximum activity under heterotrophic conditions.

PubMed Disclaimer

References

    1. Plant Physiol. 1980 May;65(5):780-4 - PubMed
    1. Plant Physiol. 1984 Feb;74(2):204-7 - PubMed
    1. Plant Physiol. 1980 Oct;66(4):619-23 - PubMed
    1. Plant Physiol. 1984 Nov;76(3):658-63 - PubMed
    1. Biochem Biophys Res Commun. 1979 May 28;88(2):515-21 - PubMed

LinkOut - more resources