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Western blot

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noun Biology, Medicine/Medical.
  1. a highly sensitive procedure for identifying and measuring the amount of a specific protein in a mixed extract, as in testing for AIDS virus protein in a blood sample: proteins are separated by gel electrophoresis and transferred to a special filter paper, on which the protein under investigation can be detected by a probe, as the binding of a labeled antibody.
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Origin of Western blot

originally a facetious counterpart to Southern blot
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018