“…One of these chromatographic techniques, immobilized metal ion affinity chromatography (IMAC), introduced by Porath et al (1975), has been employed for the purification and depletion of IgG from different sources (Boden et al, 1995;Serpa et al, 2005;Altıntaş et al, 2007;Karatas et al, 2007;Ribeiro et al, 2008;Bresolin et al, 2010;Yavuz et al, 2012). Adsorption is based on the coordination bond between a metal ion chelated on the surface of a solid matrix and electron donor groups on the surface of the biomolecule (Porath et al, 1975;Ueda et al, 2003;Bresolin et al, 2009).…”