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New modules for the repeated internal and N-terminal epitope tagging of genes in <I>Saccharomyces cerevisiae</I> Export

Yeast, Vol. 22, No. 1. (2005), pp. 1-12.

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cre-lox loxp method n-terminal_epitope_tagging

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Epitope tagging is a powerful method for the rapid analysis of protein function. In Saccharomyces cerevisiae epitope tags are introduced easily into chromosomal loci by homologous recombination using a simple PCR-based strategy. Although quite a number of tools exist for C-terminal tagging as well as N-terminal tagging of proteins expressed by heterologous promoters, there are only very limited possibilities to tag proteins at the N-terminus and retain the endogenous expression level. Furthermore, no PCR-templates for internal tagging have been reported. Here we describe new modules that are suitable for both the repeated N-terminal and internal tagging of proteins, leaving their endogenous promoters intact. The tags include 6xHA, 9xMyc, yEGFP, TEV-GST-6xHIS, ProtA, TEV-ProtA and TEV-ProtA-7xHIS in conjunction with different heterologous selection markers. Copyright © 2004 John Wiley & Sons, Ltd.


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