Affinity chromatography of radioiodinated solubilized erythrocyte stroma and of radioiodinated purified Band 3 on an anti-(blood-group I)-adsorbent column showed blood-group-I activity associated with a subpopulation of Band 3. The specificity of binding was confirmed by inhibition with known blood-group substances in radioimmunoassays.
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Childs et al. (1978) studied this question.
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