TABLE 13.
Varied specificities of ABC permeases
| Compound transported | Polarity |
|---|---|
| Inorganic cations | In or out |
| Inorganic anions | In or out |
| Sugars, polyols, oligosaccharides | In |
| Organic anions | In or out |
| Organic cations | In or out |
| Amino acids and derivatives | In |
| Amines, polyamines, and opines | In |
| Peptides (including bacteriocins and pheromones) | In or out |
| Vitamins | In |
| Fe3+ chelates | In |
| Fe3+ siderophores | In |
| Drugs; bile salts | In or out |
| Glutathione and glutathione conjugates | Out |
| Heme | In or out |
| Siderophores | Out |
| Steroids and steroid conjugates | Out |
| Fatty acids and derivatives | Out |
| Pigments | Out |
| Lipooligosaccharides | Out |
| Polysaccharides and lipopolysaccharides | Out |
| Teichoic acids | Out |
| Proteins | Out |
| Lipids | Out (flipping) |