title: A rapid and sensitive method for the analysis of cyanophycin.
abstract: A method has been devised for the quantitative analysis of cyanophycin, based on (1)H nuclear magnetic resonance (NMR) spectroscopy, allowing determination of the nitrogen status of cyanobacteria. Cyanophycin is extracted with minimal washing from small volumes of cells and quantified by integration of the NMR peak attributed to the protons attached to the delta-carbon of arginine. Linear relationships were found between the amount of cyanophycin determined by this method and both known concentrations of cyanophycin solutions and the amount of cyanophycin determined using the standard chemical arginine assay.
authors: Department of Biological Sciences, Wellesley College, Wellesley, MA 02481, USA.
authors: N A
authors: NA
authors: Erickson
authors: N H
authors: NH
authors: Kolodny
authors: M M
authors: MM
authors: Allen
mesh_terms: D001426:Bacterial Proteins; D000458:Cyanobacteria / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D010940:Plant Proteins / Q000032:analysis* / Q000302:isolation & purification; D015203:Reproducibility of Results
chemical_list: D001426:Bacterial Proteins; D010940:Plant Proteins; C024250:cyanophycin