Erratum to: Biometals (2014) 27:65–73 DOI 10.1007/s10534-013-9687-2

The authors are indebted to S. Carulli for collecting very preliminary TLC-MALDI MS data in the course of his PhD thesis work. I. Verrastro is gratefully acknowledged for his skilled help in collecting some experimental results during his Laurea thesis work.