title: Colorimetric quantification of in vitro-amplified template DNA to be used for solid phase sequencing.
abstract: A protocol for colorimetric determination of DNA amplified by the polymerase chain reaction (PCR) and subsequently immobilized to a solid support is described. The protocol consists of three steps: (i) binding of PCR amplified lac operator-containing DNA to magnetic beads; (ii) binding of a Lac repressor-beta-galactosidase fusion protein to the lac operator and (iii) colorimetric detection of the immobilized beta-galactosidase. In practice, steps (i) and (ii) are performed concurrently. The protocol is well suited both for manual and automated procedures and the immobilized template can, after melting, be used directly for solid phase sequencing. The assay is used to demonstrate that template concentration is important for the quality of sequence data obtained from an automated DNA sequencer.
authors.affiliation: Department of Biochemistry and Biotechnology, Royal Institute of Technology, Stockholm, Sweden.
authors.forename: S
authors.initials: S
authors.lastname: Bergh
authors.forename: T
authors.initials: T
authors.lastname: Hultman
authors.forename: M
authors.initials: M
authors.lastname: Uhlén
mesh_terms: D001483:Base Sequence; D003124:Colorimetry / Q000379:methods*; D004247:DNA / Q000032:analysis*; D008969:Molecular Sequence Data; D016133:Polymerase Chain Reaction; D013302:Streptomyces / Q000235:genetics; D013698:Templates, Genetic
chemical_list: D004247:DNA