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Summary. A specific receptor for intrinsic factor‐vitamin B12 complex has been prepared in soluble form from human intestinal mucosal cell membranes employing Triton X‐100. The extraction procedure has not detectably altered its characteristics relative to membrane‐bound receptor. It appears to be macromolecule containing critical peptide and disulphide bonds.
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Katz et al. (1974) studied this question.
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