Correction to: Amino Acids (2014) 46:2403–2413 https://doi.org/10.1007/s00726-014-1793-0

In the published article, the images for Actin in Figs. 4a, 5a, 6a, and 6c were incorrectly presented. This error does not affect the conclusion of the study. The corrected images for Actin are shown below.

figure a

Figure legend: a The corrected images of Actin for Figs. 4a and 6a; b the corrected images of Actin for Figs. 5a and 6c.