Technical Information on Enzyme Antibody Conjugates


Enzyme conjugated affinity purified antibodies are useful in immunohistochemistry, Elisa procedures, Western and other immunoblotting assays and immunoelectronmicroscopy. PROTOS IMMUNORESEARCH offers primary and secondary antibodies conjugated to peroxidase or alkaline phosphatase. The working dilutions for these reagents are 1:1,000 to1:5,000 for peroxidase, and 1:1,000 to 1:3,000 for alkaline phosphatase, though these values vary with individual modifications of the techniques.

Studies with enzyme conjugates of affinity purified antibodies sometimes are complicated by the non-specific binding of the Fc part of immunoglobulins by Fc-receptors on tissues and cells.This complication can be eliminated by enzymatically removing the Fc portion of the antibody before preparing the enzyme conjugate. PROTOS IMMUNORESEARCH provides enzyme conjugates of F(ab')2 fragments with peroxidase or alkaline phosphatase. The working dilutions of these reagents are approximately the same as for the enzyme conjugates of the intact molecules.

For applications where tissue or cellular penetration of antibody-enzyme conjugates is important, PROTOS IMMUNORESEARCH offers low molecular weight Fab' antibody(i.e.3.5S) fragments conjugated to peroxidase. 


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