Immunological Techniques
Agarose gel electrophoresis and pulsed field gel electrophoresis may be used to resolve respectively

2000 kb and 20kb DNA
10 kb and 1000 kb DNA
1000 kb and l0kb DNA
20 kb and 2000 kb DNA

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Immunological Techniques
In Counter immunoelectrophoresis

electrophoresis will drive the antibody and antigen toward each other
the antibody will migrate towards cathode
the antibody will migrate towards anode
electrophoresis will drive the antibody and antigen parallel to each other

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