Lipid TD5

Gene editing modify specific sites within the genome through gene deletions, insertions or conversions to study functionally unknown genes or conduct gene therapy. It is also used to change the biological traits of organisms to establish new varieties. Gene editing techniques include zinc finger nuclease (ZFN), transcription activator-like effector nuclease (TALEN), and clustered regularly interspaced short palindromic repeats (CRISPR)/CRISPR-associated protein 9 (Cas 9) (CRISPR/Cas9).

By lysing cells, releasing RNA, and removing impurities such as proteins and DNA, high-purity RNA products are finally obtained. The commonly used traditional method is the guanidine isothiocyanate/phenol/chloroform method (Trizol), which is suitable for a variety of animal materials including animal tissues, microorganisms, cultured cells, etc., and most plant materials.

CRISPR-Cas9 knockout in cultured mammalian cells uses an sgRNA to direct Cas9 to a complementary genomic sequence adjacent to a compatible PAM; Cas9 creates a targeted DNA double-strand break, and repair by non-homologous end joining can introduce insertions or deletions that disrupt the coding sequence or functional genomic element. The readout of knockout is detection of edited alleles and loss of gene product or phenotype, commonly by PCR/Sanger-sequence trace decomposition, targeted sequencing, immunoblotting, immunostaining, or flow cytometry when the target protein is detectable at the cell surface.