G‐Biosciences Colloidal Blue Stain is a mass spectrometry compatible stain that offersnanogram sensitive detection of proteins. The stain offers ten times more sensitivitycompared to classical Coomassie R‐ or G‐250 detection. The Colloidal Blue Stain is ableto detect <10ng BSA. In addition, the protein bands are visualized on crystal clearbackgrounds, following a water wash, allowing for optimal densitometry results.