Accession Number : ADA327736

Title :   Detection of Cholera Toxin by Optical Methods: A Mechanism-Based Approach to the Generic Detection of Protein Toxins.

Descriptive Note : Final rept. Mar-Sep 96,

Corporate Author : EDGEWOOD RESEARCH DEVELOPMENT AND ENGINEERING CENTER ABERDEEN PROVING GROUNDMD

Personal Author(s) : Young, Ronald J. ; Hsu, Fu-Lien

PDF Url : ADA327736

Report Date : APR 1997

Pagination or Media Count : 20

Abstract : Methods to monitor the ADP-ribosyltransferase activity of cholera toxin fragment A were investigated. Ultraviolet spectroscopy was a suitable technique when the acceptor molecule contained a chromophore. Toxin catalyzed ADP-ribosylation of acceptor molecules, which do not contain a chromophore but do contain an amino group, can be monitored by labeling the acceptor molecule with a fluorescent probe after its ADP-ribosylation. The sensitive technique of fluorescence spectroscopy can be employed to monitor the action of cholera toxin without regards to the substituents on the acceptor molecule by use of epsilon NAD, the fluorescent analogue of NAD.

Descriptors :   *INFECTIOUS DISEASES, *CHOLERA, OPTICS, PROBES, FLUORESCENCE, CHROMOPHORES, MOLECULES, TOXICITY, AMINES, ULTRAVIOLET SPECTROSCOPY, BIOLOGICAL DETECTION, BACTERIAL DISEASES, NUCLEOTIDES.

Subject Categories : Biochemistry
      Medicine and Medical Research
      Atomic and Molecular Physics and Spectroscopy
      Optics

Distribution Statement : APPROVED FOR PUBLIC RELEASE