Abstract
On the basis of scanning densitometry of the stained gel, the conditions for the quantitative determination of individual histones by silver was examined and compared with the dye-staining method, in terms of higher sensitivity and faithful quantitation. Fixation with formaldehyde, coupled with simultaneous prestaining with Coomassie brilliant blue (CBB), was found to be most suitable. Prior fixation in acidic alcohol alone failed to stain the histones accurately, but this failure could be partly alleviated by prestaining with CBB. Although the sensitivity for detecting histones by silver staining is lower than that for neutral proteins by about 10-fold, it is at least 10-fold higher than the CBB stain.
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