Table 13.

Varied specificities of ABC permeases

Compound transportedPolarity
Inorganic cationsIn or out
Inorganic anionsIn or out
Sugars, polyols, oligosaccharidesIn
Organic anionsIn or out
Organic cationsIn or out
Amino acids and derivativesIn
Amines, polyamines, and opinesIn
Peptides (including bacteriocins and pheromones)In or out
VitaminsIn
Fe3+ chelatesIn
Fe3+ siderophoresIn
Drugs; bile saltsIn or out
Glutathione and glutathione conjugatesOut
HemeIn or out
SiderophoresOut
Steroids and steroid conjugatesOut
Fatty acids and derivativesOut
PigmentsOut
LipooligosaccharidesOut
Polysaccharides and lipopolysaccharidesOut
Teichoic acidsOut
ProteinsOut
LipidsOut (flipping)