Staining cells: Methylene blue stains negatively charged cell components ... And it does this by, I believe, breaking down any pathogenic cell wall and donating an electron.

Please wear gloves and work with the stain in the hood. Place a piece of paper towel on top of the dye. Be sure the paper towel is saturated with the dye. Counterstain with Methylene Blue for 30 ...

The cell wall of most bacteria has an overall net negative charge and thus can be stained directly with a single basic (positively charged) stain or dye. This type of stain allows us to observe the ...