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A novel method for detergent concentration determination
JournalArticle (Originalarbeit in einer wissenschaftlichen Zeitschrift)
 
ID 153219
Author(s) Kaufmann, Thomas C; Engel, Andreas; Rémigy, Hervé-W
Author(s) at UniBasel Engel, Andreas
Year 2006
Title A novel method for detergent concentration determination
Journal Biophysical journal
Volume 90
Number 1
Pages / Article-Number 310-7
Keywords Biophysics/methods; Calcium-Binding Proteins/*chemistry; Calibration; Chromatography; Affinity; Detergents/*analysis/chemistry/*pharmacology; Dose-Response Relationship; Drug; Escherichia coli/metabolism; Glucosides/chemistry; Image Processing; Computer-Assisted; Membrane Proteins/chemistry; Microscopy/*instrumentation/methods; Microscopy; Video; Monosaccharide Transport Proteins/*chemistry; Periplasmic Binding Proteins/*chemistry; Protons; Surface Properties; Surface-Active Agents/chemistry
Abstract A fast and precise method for detergent concentration determination is presented. (Patent applications for the method described here have been submitted (EP05011904 and US60/702,261). Depending on the interest of the scientific community, the system will be commercialized. (For further information contact Herve-W. Remigy at the e-mail address below.) A small droplet of the detergent solution is deposited on a piece of Parafilm M and side views are recorded by two orthogonally arranged TV cameras. The droplet contours are then approximated by ellipses to determine the contact angles. Comparison of the observed contact angle values to calibrated standard curves of known detergent concentrations gives the concentration of the detergent assessed. A range of commonly used detergents was studied to demonstrate the reproducibility and precision of this simple method. As a first application, the detergent binding capacity of the Escherichia coli galactose/proton symporter (GalP) was assessed. Aggregation of GalP was observed when <260 +/- 5 dodecyl-beta,D-maltoside molecules were bound to one GalP molecule. These measurements document the efficacy of the drop-shape based detergent concentration determination described.
Publisher Biophysical Society
ISSN/ISBN 0006-3495
edoc-URL http://edoc.unibas.ch/dok/A5257633
Full Text on edoc No
Digital Object Identifier DOI 10.1529/biophysj.105.070193
PubMed ID http://www.ncbi.nlm.nih.gov/pubmed/16214861
ISI-Number WOS:000233885100031
Document type (ISI) Journal Article
 
   

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