Figure 2

The uptake of [¹⁴C]GlySar, [³H]cefadroxil, [³H]carnosine and [¹⁴C]5-ALA was measured in isolated CP from Pept2^-/- (KO) and Pept2^+/+ (WT) mice [24–26]. The KO uptake is expressed as a % of WT. With the exception of cefadroxil (where a small portion of uptake is mediated by an organic anion transporter), uptake in CPs from KO mice was < 10% of WT.