Fig. 5From: Role of electrostatic interactions for ligand recognition and specificity of peptide transportersSubstrate specificity of K314E and K314A YePEPT mutants. [3H]Ala-Ala uptake competition experiments performed with E. coli cells expressing (a) K314E and (b) K314A mutants of YePEPT. Error bars represent SEM from four independent experiments, each in triplicateBack to article page