Dictionary  South'ern blot'Biol., Med. a procedure for identifying and measuring the amount of a specific DNA sequence or gene in a mixed extract, as in testing for a mutation or a virus: DNA strands from the person or organism under study are cut with restriction enzymes, separated by gel electrophoresis, transferred to special filter paper, and hybridized with a labeled DNA probe. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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