Erratum to: Amino Acids (2012) 42:769–774 DOI 10.1007/s00726-011-0993-0

In the original publication of this article, the first and last names of authors were incorrectly published. The correct author names are given below:

Andrea Bandino · Valentina Battaglia · Vittoria Bravoco · Chiara Busletta · Alessandra Compagnone · Carlo Cravanzola · Floriana Meli · Enzo Agostinelli · Maurizio Parola · Sebastiano Colombatto

The correct affiliation of Enzo Agostinelli is: Istituto Pasteur–Fondazione Cenci Bolognetti, Department of Biochemical Sciences, SAPIENZA University of Rome and CNR, Institute Biology and Molecular Pathology, Piazzale Aldo Moro 5, 00185, Rome, Italy