loxP-gb2-cm-loxP

Prokaryotic Chloramphenicol Selection Cassette flanked by loxP-sites

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Description

The loxP-cm-loxP cassette is designed to allow chloramphenicol selection in prokaryotic cells. The prokaryotic promoter gb2 driving the gene for chloramphenicol resistance is a slightly modified version of the Em7 promoter. It mediates higher transcription efficiency than the generally used Tn5 promoter. A synthetic polyadenylation signal terminates the chloramphenicol expression. The cassette is flanked by loxP sites for later excision by Cre Recombinase. Unique NotI and XhoI sites flank the cassette for convenient cloning with restriction sites. Using the provided PCR template one can easily create a loxP-cm-loxP cassette flanked by any other restriction sites to clone the cassette into the vector of choice. The restriction sites can be introduced by adding the corresponding sequence in the PCR primer. The template can easily be used to engineer the E.coli genome by Red/ET Recombination. The loxP-cm-loxP cassette is not linear but plasmid based (3301 bp in size). Due to its R6K origin the plasmid cannot replicate in most E.coli strains. The PCR product can therefore be used directly for downstream applications without any further purification. At least 20 PCR reactions can be performed using 1 ul per reaction as template.

Contents

• loxP-cm-loxP: PCR template (50 ng/ul, 20ul)
• Manual

Sequences

loxP-gb2-cm-loxP