Plasmids 101: Blue-white Screening
Type
Blog Post
...chloro-3-indolyl-β-D-galacto-pyranoside) into galactose and an insoluble blue pigment (4-chloro-3-brom-...insert. All colonies on this plate should be blue, indicating that your IPTG and x-gal are working as they ...of false positives: Blue-white screening only indicates the presence of AN insert, not necessarily YOUR...