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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Characterization of the synthetic compatible solute homoectoine as a potent PCR enhancer.

Different substances such as dimethyl sulfoxide, tetramethylene sulfoxide, 2-pyrollidone, and the naturally occurring compatible solute betaine enhance PCR amplification of GC-rich DNA templates with high melting temperatures. In particular, cyclic compatible solutes outperform traditional PCR enhancers. We therefore investigated the effects that cyclic naturally occurring ectoine-type compatible solutes and their synthetic derivatives have on melting temperature of double-stranded DNA (dsDNA) and on PCR amplification of different templates. L-ectoine, betaine, and derivatives of L-ectoine decreased, whereas beta-hydroxyectoine increased, the melting temperature of dsDNA. The ability to decrease the melting temperature was greatest for homoectoine, a new synthetic derivative of l-ectoine. Furthermore, compatible solutes, especially homoectoine, enhanced PCR amplification of GC-rich DNA (72.6% GC content; effective range: 0.1-0.5M).[1]


  1. Characterization of the synthetic compatible solute homoectoine as a potent PCR enhancer. Schnoor, M., Voss, P., Cullen, P., Böking, T., Galla, H.J., Galinski, E.A., Lorkowski, S. Biochem. Biophys. Res. Commun. (2004) [Pubmed]
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