Figure 2.

Concentration-dependent uptake of [14C]ALA in rat neonatal astrocytes in the presence of 10–1000 μM ALA. The uptake was fitted by nonlinear regression in which Vmax = 714 pmol/mg protein/min, Km = 606 μM and Kd = 0.028 μl/mg protein/min (r2=0.999).