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. 1992 Oct 15;89(20):9754–9758. doi: 10.1073/pnas.89.20.9754

Metal-binding chimeric antibodies expressed in Escherichia coli.

J R Sawyer 1, P W Tucker 1, F R Blattner 1
PMCID: PMC50211  PMID: 1409694

Abstract

Metallothionein, a well-characterized biological chelator of metals, has been genetically fused to the binding domain of an antibody and expressed in the periplasm of Escherichia coli. Specific delivery of 109Cd to immobilized hapten or to haptenated cells was demonstrated directly in periplasmic extracts. This approach is potentially useful for targeted radiotherapy and diagnostic imaging. We find six to seven atoms of metal per active antigen-combining site. Absence of the Fc portion of the immunoglobulin along with low immunogenicity of metallothionein-metal complexes should reduce immunologic reactions.

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Selected References

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