Figure 3.

Phenylalanine and tyrosine concentrations as well as phenylalanine:tyrosine concentration ratio in dried blood spots and MD fluid relative to serum values (100%). Mean and standard deviation of phenylalanine (Phe) and tyrosine (Tyr) concentrations and of the phenylalanine:tyrosine concentration ratio ([Phe]/[Tyr]) in dried blood and microdialysis fluid (MD fluid) relative to the corresponding serum values (100%).

GrĂ¼nert et al. Nutrition Journal 2013 12:60   doi:10.1186/1475-2891-12-60
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