title: An optimized freeze-squeeze method for the recovery of DNA fragments from agarose gels.
abstract: A procedure for quick and simple elution of DNA from agarose gels is presented. After electrophoresis, bands of interest are cut out of the gel and the slices are equilibrated in a neutral salt buffer. The slices are then frozen and centrifuged through a filtration assembly whereby the DNA-containing buffer is squeezed out. The method is simple, quick, and suitable for the safe handling of small amounts of DNA (less than 1 microgram). The isolated DNA is susceptible to any enzymatic reaction and also to chemical sequencing. The method is most useful for rapid preparation of specifically end-labeled DNA fragments (e.g., for sequencing), but may also be utilized for any other preparative applications.
mesh_terms: D010582:Bacteriophage lambda / Q000378:metabolism; D004247:DNA / Q000302:isolation & purification* / Q000378:metabolism; D004262:DNA Restriction Enzymes; D004587:Electrophoresis, Agar Gel; D006863:Hydrogen-Ion Concentration; D008970:Molecular Weight; D012492:Salts; D012685:Sepharose
chemical_list: D012492:Salts; D004247:DNA; D012685:Sepharose; D004262:DNA Restriction Enzymes