Table 1.

Kinetic parameters for glucose transporters and energetic costs for glucose internalization and phosphorylation*.

Transporter	Km	Vmax	Energetic costsa
IIGlc complex	3–10 μM	126 μmol min-1 g-1	1 PEP
IIMan complex	15 μM	72 μmol min-1 g-1	1 PEP
GalP	10.2 μM	15.6 μmol min-1 g-1	1 H+ + 1 ATP
MglABC	N.D	N.D.	2 ATP
Glf	4.1 mM	75 μmol min-1 g-1	1 ATP

* N.D., not determined.

^a The energetic cost equivalent of 1 mol of PEP is 1 mol of ATP.