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Molecular encapsulation: cyclodextrin-based analogs of heme-containing proteins

The active site heme prosthetic group of such species as hemoglobin, the cytochrome P-450s, and the peroxidases is enveloped within a protective hydrophobic environment located adjacent to a binding site for exogeneous compounds. In addition to providing these physical attributes, the protein component also acts as a carrier, transporting the heme to the appropriate cellular environment. We have replaced this proteinoid appendage with a cyclodextrin-based protective sheath to create artificial analogues of heme-containing proteins