Figure 1From: Phenylketonuria: reduced tyrosine brain influx relates to reduced cerebral protein synthesisThree-compartment model of 11C fluxes, adapted from Willemsen et al. (1995). Each rate constant kA,B reflects the unidirectional 11C transport to compartment A from compartment B. Compartment 1: blood free 11C-Tyr; compartment 2: brain free 11C-Tyr; compartment 3: brain 11C-protein, i.e. 11C-Tyr incorporated into cerebral protein.Back to article page