1. Transmission densitometry of stained nitrocellulose paper
- Author
-
Rose A. Maciewicz and Peter J. K. Knight
- Subjects
Paper ,Cathepsin L ,Blotting, Western ,Immunoblotting ,Biophysics ,Biochemistry ,Cathepsin B ,Absorbance ,chemistry.chemical_compound ,Endopeptidases ,Densitometer ,Molecular Biology ,Cathepsin ,Chromatography ,biology ,Staining and Labeling ,Chemistry ,Collodion ,Cell Biology ,Cathepsins ,Staining ,Cysteine Endopeptidases ,biology.protein ,Densitometry ,Nitrocellulose - Abstract
We report a simple solution to the problem of quantitative densitometry of stained nitrocellulose paper. By immersing the paper in a household lubricating oil of matching refractive index, the light-scattering properties of the paper are largely eliminated, allowing precise transmission densitometry in any flat bed densitometer. The method was evaluated on immunochemically stained Western blots of the proteinases cathepsins B and L. An approximately linear relationship was found between the integrated absorbance of the stained zone and the logarithm of the amount of protease applied to the polyacrylamide gel over the range of 150 to 350 ng of cathepsin B and 50 to 250 ng of cathepsin L.
- Published
- 1988