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URL: http://www.addgene.org/52628
Proper Citation: RRID:Addgene_52628
Insert Name: Kanamycin cassette
Organism: Bacterial origin
Bacterial Resistance: Ampicillin and Kanamycin
Vector Backbone Description: Backbone Size:7145; Vector Backbone:pLKO.1; Vector Types:Mammalian Expression, Lentiviral, CRISPR; Bacterial Resistance:Ampicillin and Kanamycin
Comments: This is a second generation plasmid that increases the efficiency of sgRNA guide cloning over the original "pLKO.1-puro U6 sgRNA BspMI stuffer" vector. "pLKO.1-puro U6 sgRNA BfuAI large stuffer" was created to simplify the cloning of the sgRNA guide cassette into pLKO.1-puro U6 sgRNA BspMI stuffer vector originally described in the manuscript “Kearns, NA, etal. Development 2014, 141(1):219-23”. The original vector has a small intervening sequence that presents two problems: 1) the efficiency of excision by BfuAI is moderate, and 2) the size of this spacer is similar to the guide sequence, which makes distinguishing positive clones from reclosures challenging. Consequently, we have inserted a Kanamycin cassette between these sites at a unique Bcl1 site. This element is more efficiently excised by BfuAI and makes distinguishing vectors containing the desired guide sequence easy to distinguish from the parent vector. The excision of the Kan cassette by BfuAI cuts this cassette into 3 fragments due to two internal BfuAI sites within the Kan cassette. Otherwise the cloning of the guides is carried out as described in the manuscript.
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Source: Addgene