previous studies have shown that arthrobacter pyridinolis can transport d-fructose or l-rhamnose using either a phosphoenolpyruvate : hexose phosphotransferase ( phosphoenolpyruvate : protein phosphotransferase , ec 2.7.3.9 ) system or a respiration-coupled transport system which requires the presence of exogenous l-malate .
C0016745
fructose
C0019494
hexose