Plasmids 101: Positive and Negative Selection for Plasmid Cloning
Type
Blog Post
...backbone contains a kanamycin resistance cassette, you would plate the cells on kanamycin-containing agar..... Only cells carrying plasmids that contain a kanamycin resistance cassette will grow.
However, often ...successful uptake of your DNA of interest by taking advantage of bacterial characteristics such as prototrophy...strategy uses the toxin CcdB. Gateway cloning takes advantage of this property by including ccdB on its destination...