Erratum to: Amino Acids (2017) 49:161–172 DOI 10.1007/s00726-016-2344-7

In the subsection “Arterial venous differences” of the “Materials and methods” section, the below formula was wrongly published. The correct version is given below.

∆AV liver = [0.3 × A + 0.7 × PV] − [HV].