Size exclusion chromatograms of (a) egg white in water (1:10, v:v, egg white:buffer), (b) PEG–rich phase, (c) precipitated proteins re-dissolved in a buffer solution, (d) salt-rich phase of the ABS composed of 25 wt% of PEG 400 + 25 wt% of K3C6H5O7/C6H8O7 + 50 wt% of an egg white aqueous solution (1:10, v:v), (e) commercial ovalbumin; and (f) recovered ovalbumin after the purification and precipitation steps.