Description Application Phloxine B has been used to trace the uptake of double stranded RNA by green peach aphids.[3] It has also been used to stain yeast strains.[4] Packaging 25, 100 g in glass bottle Biochem/physiol Actions Phloxine B has been demonstrated as an alternative to Gram staining.[1] It was found to inhibit the growth of methicillin-resistant Staphylococcus aureus. Phloxine B stimulated and inhibited the channel activity of wild-type cystic fibrosis transmembrane conductance regulator (CFTR).[2] It has antibacterial properties. Phloxine B staining can be used to distinguish between gram-positive and gram-negative bacteria.[1]