Fig. 9

A model of the effect of loss of function of the creatine transporter on glucose uptake. The normal creatine/phosphocreatine shuttle is represented in (A) while (B) is a model of what occurs when the creatine transporter is mutated and the brain relies on glucose solely as the source of energy. (ATP, adenosine triphosphate; ADP, adenosine diphosphate; CRT, creatine transporter; Cr, creatine; PCr, phosphocreatine; CK, creatine kinase.