A simple and economical strategy for downstream processing of specific antibodies to human transferrin from egg yolk.

A rapid and economical procedure for extraction of antibodies from egg yolk is described. Laying hens were immunized with human transferrin and extracts of egg-yolk were purified with a procedure based on affinity chromatography. The resulting purified antibodies were evaluated in a nephelometric system for the assay of transferrin in human sera. The results agreed closely with those obtained with a commercially available anti-human transferrin serum from rabbits.