Related Experiment Video
Updated: Aug 8, 2026

Glutamine Flux Imaging Using Genetically Encoded Sensors
Published on: July 31, 2014
Heterogeneity of Glutamine Synthetase Polypeptides in Phaseolus vulgaris L
1Centro de Investigación sobre Fijación de Nitrógeno, U.N.A.M., Cuernavaca, Mor. Apartado Postal 565-A, México.
Abstract:
Glutamine synthetases from roots, nodules, and leaves of Phaseolus vulgaris L. have been purified to homogeneity and their polypeptide composition determined.The leaf enzyme is composed of six polypeptides. The cytosolic fraction contains two 43,000 dalton polypeptides and the chloroplastic enzyme is formed by four 45,000 dalton polypeptides. Root glutamine synthetase consists only of the same two polypeptides of 43,000 dalton that are present in the leaf enzyme. The nodule enzyme is formed by two polypeptides of 43,000 dalton, one is common to the leaf and root enzyme but the other is specific for N(2)-fixing nodule tissue. The two glutamine synthetase forms of the nodule contain a different proportion of the 43,000 dalton polypeptides.
More Related Videos
Related Concept Videos
Pharmacogenetics of Phase II Enzymes: N-acetyltransferase, Thiopurine S-methyltransferase, UDP-glucuronosyltransferase
Protein Folding Quality Check in the RER
Leaky Scanning
Pharmacogenetics of Phase I Enzymes: Cytochrome P450 Isozymes
Protein Complexes with Interchangeable Parts
The SCF ubiquitin ligase is a protein complex of five individual proteins. This complex attaches ubiquitin to other target proteins to mark them for degradation. In order to...
Pharmacogenetics of Drug Transporters: P-Glycoprotein and Solute Carrier Transporters

