The Cas9 nuclease and requirements for RNA-guided genome-editing. Cas9 is the nuclease guided by the crRNA and tracrRNA (or trans-activating crRNA) to cleave specific DNA sequences (Deltcheva et al.2011). A guide RNA (gRNA) can be designed to include a hairpin that mimics the tracrRNA-crRNA complex (Jinek et al. 2012).he Cas9 nuclease and requirements for RNA-guided genome-editing. Cas9 is the nuclease guided by the crRNA and tracrRNA (or trans-activating crRNA) to cleave specific DNA sequences (Deltcheva et al. 2011).
Solid Surface Bathroom Countertops: These countertops are made from synthetic materials, so they are manufactured in many colors and styles. The pros of solid surface countertops include the choices, strength and a non-porous surface that cleans up quickly.
They are well-suited to radioactive and bacteriological work, as well as laboratory work involving use of organic solvents. Stainless steel countertops come in a variety of grades and finishes. Natural stone Natural stone slabs, made of sandstone or soapstone, are often used for laboratory countertops. Sandstone, impregnated with a baked-on resin surface, is resistant to chemicals but not to high, continuous heat.