Fast and Accurate Method for Quantitating E. Coli Host-Cell DNA Contamination in Plasmid DNA Preparations | Zendy

Greg Smith | Zendy; Maximilian J. Helf | Zendy; C. Nesbet | Zendy; Herman Betita | Zendy; Jennifer Meek | Zendy; F. Ferré | Zendy

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Fast and Accurate Method for Quantitating E. Coli Host-Cell DNA Contamination in Plasmid DNA Preparations

Author(s) -

Greg Smith,

Maximilian J. Helf,

C. Nesbet,

Herman Betita,

Jennifer Meek,

F. Ferré

Publication year - 1999

Publication title -

biotechniques

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.617

H-Index - 131

eISSN - 1940-9818

pISSN - 0736-6205

DOI - 10.2144/99263rr03

Subject(s) - plasmid , dna , biology , vector (molecular biology) , contamination , escherichia coli , plasmid preparation , recombinant dna , microbiology and biotechnology , alkaline lysis , gene , genetics , dna vaccination , ecology , pbr322

Plasmid DNA is being used successfully as a gene delivery vector in a variety of clinical applications. Similar to other pharmaceutical products for clinical use, the plasmid vectors must meet rigorous purity standards. One important contaminant is the DNA of the host cell used to produce the plasmids. We have developed a new method to accurately quantitate E. coli host-cell DNA in plasmid preparations. This method is based on kinetic PCR using the ABI PRISM 7700 with 23S rDNA as a target. This precise assay is significantly faster and has a lower limit of quantitation than the currently used Southern-based methods.

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