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. 1989 Nov 25;17(22):9437–9446. doi: 10.1093/nar/17.22.9437

Absolute mRNA quantification using the polymerase chain reaction (PCR). A novel approach by a PCR aided transcript titration assay (PATTY).

M Becker-André 1, K Hahlbrock 1
PMCID: PMC335144  PMID: 2479917

Abstract

The polymerase chain reaction (PCR) is used as part of a new approach to the absolute quantification of mRNA. We describe a PCR aided transcript titration assay (PATTY) which is based on the co-amplification of an in vitro generated transcript differing by a single base exchange from the target mRNA. Identical portions of a total RNA sample are "spiked" with different amounts of this mutated standard RNA, converted to cDNA and amplified by PCR. Because the base exchange creates a novel restriction endonuclease site, the ratio of co-amplified DNA derived from target mRNA to amplified DNA derived from standard RNA can be determined after restriction endonuclease digestion and separation by gel electrophoresis. This method gives accurate results within 24 hours and is useful especially for the quantification of either low-abundance mRNA or more abundant mRNA present in very small amounts of total RNA. The low-abundance mRNA encoding 4-coumarate:CoA ligase (4CL) in cultured potato cells (Solanum tuberosum L.) was measured in a case study. About 100 molecules per assay could be accurately detected by the new method.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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