Immunoadsorbents that were potentially suitable for the fractionation of antibodies to myoglobin were prepared by coupling myoglobin to aminoethylcellulose, bromoacetylcellulose, CM-cellulose, an ethylene–maleic anhydride co-polymer and Sepharose 4B. A comparison of the properties of the preparations indicated that Sepharose–myoglobin was superior, as an immunoadsorbent, to the other conjugates. Elution of adsorbed antibodies with m-propionic acid, pH2.5, gave yields of precipitable antibody higher than those achieved with other dissociating solvents. Propionic acid eluted 60–100% of the antibody adsorbed by Sepharose–myoglobin, and 60–90% of the eluted protein was precipitable antibody.
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