title: Uniformly spaced banding pattern in DNA sequencing gels by use of field-strength gradient.
abstract: A method is described for casting and operating ultrathin wedge-shaped field-strength gradient gels for DNA sequencing. One of the gradients results in a uniformly-spaced oligonucleotide banding pattern from 60 to 300 nucleotides in a 53 cm long 4% polyacrylamide gel. From these field-strength gradient gels, more sequencing data can be obtained with greater confidence than from gels with uniform thickness. The gel-casting method is fast and simple. At 2.5 kV two gels can be run simultaneously in 2 h with the same power supply.
mesh_terms: D001407:Bacillus / Q000235:genetics; D001483:Base Sequence; D004269:DNA, Bacterial / Q000032:analysis*; D004591:Electrophoresis, Polyacrylamide Gel; D008722:Methods
chemical_list: D004269:DNA, Bacterial