BCA-Protein-Quantification: Time Drive?
deleteme_cpeter at zedat.fu-berlin.de
Fri Aug 7 03:03:24 EST 1998
I use the bicinchoninic-acid-assay in a 96well format to
determine/estimate protein concentrations. I always have a
standard-dilution-row on every plate.
When I tried to determine the concentration of a simple yeast-extract,
I noted the following:
- the slope of the calibration-line (mg as a function of A550)
decreases with time (15min to 3hrs)
- the concentration of my extract also decreases with time!!!!
(calculated with corresponding slope!)
As the assay is designed to be read after 30min and 30degrees C - when
do I get the _correct_ concentration?????????????????
PhD Student (Biotechnology)
cpeter at zedat dot fu-berlin dot de
>Alles wird gut!<(Beate)
More information about the Proteins