GENE ANALYSIS: DNA

Sunday, June 1st, 2008

SOUTHERN BLOTTING One of the most useful techniques for analyzing a gene at the level of genomic DNA is Southern blotting, named for its originator, E.M. Southern.18 In general, it allows one to determine whether specific nucleotide sequences in a cloned probe are present in a sample of genomic DNA. The ...

RESTRICTION ENDONUCLEASESAND RECOMBINANT DNA

Sunday, June 1st, 2008

In eukaryotic chromosomes, individual molecules of DNA are several million base pairs long. Because these molecules are far too large to analyze directly, scientists are usually interested in cutting DNA into fragments of manageable size. Fortunately, for molecular biologists, bacteria have evolved a highly diverse set of enzymes, the “restriction ...