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What does TDI stand for?

TDI stands for two-dimensional immunoelectrophoresis


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All variants of immunoelectrophoresis require immunoglobulins, also known as antibodies reacting with the proteins to be separated or characterized. The methods were developed and used extensively during the second half of the 20th century. In somewhat chronological order: Immunoelectrophoretic analysis (one-dimensional immunoelectrophoresis.
Several antigens in a complex mixture can be quantitated simultaneously with a modification of rocket electrophoresis called two-dimensional immunoelectrophoresis. In this technique antigen is first separated into components by electrophoresis. The gel is then laid over another agar gel containing antiserum and electrophoresis is repeated at right angles to the first direction, forming precipitin peaks similar to those obtained with rocket electrophoresis.