Directional cloning requires that the plasmid vector be cleaved with two restriction enzymes that generate incompatible termini and that the fragment of DNA to be cloned carries termini that are compatible with those of the doubly cleaved vector. - [Read Directional Cloning into Plasmid Vectors Protocol]
Using hybridization, it is possible to identify a single recombinant that carries the desired target sequence on a filter that carries the imprint of 15,000 or more plaques. - [Read Hybridization of Bacteriophage DNA on Filters Protocol]
This stage of the procedure describes the transfection with target genes of cell lines already expressing inducible tTA. In this example, the target genes are transfected on a plasmid that carries puromycin resistance as a selectable marker. - [Read Tetracycline as Regulator of Inducible Gene Expression Protocol II]
A. tumefaciens is a soil-dwelling bacterium that transforms normal plant cells into tumor-forming cells by inserting a piece of bacterial DNA (the transfer, or "T," DNA) into the plant cell genome. The Ti plasmid also carries many of the transfer functions for mobilizing the T-DNA. This article provides a brief discussion of the principles of T-DNA transformation, including consideration of T-DNA vectors and their hosts. - [Read Vectors and Agrobacterium Hosts for Arabidopsis Transformation Protocol]