Protein tag

Get tips on using pET-32c to perform Protein Expression Prokaryotic cells - E. coli rpf-like protein

Get tips on using ON-TARGETplus Human RAB11FIP1 (80223) siRNA - SMARTpool to perform siRNA / miRNA gene silencing Human - MDA-MB-231 Rab Coupling Protein (RCP)

Get tips on using EMBacY#5 to perform Protein Expression Eukaryotic cells - Hi5 Soluble G protein (Hendra Virus)

Get tips on using RIPA Lysis Buffer (ProteinSimple) to perform Protein isolation Tissue - Mouse aorta

Get tips on using RIPA Lysis Buffer (ProteinSimple) to perform Protein isolation Tissue - Mouse cardiac tissue

Get tips on using pTip-QC2-gi_21218674 to perform Protein Expression Prokaryotic cells - R. erythropolis putative DNA-binding protein

Get tips on using pET30a(+)-karp to perform Protein Expression Prokaryotic cells - E. coli 56‐kDa O. tsutsugamushi strain Karp protein

Get tips on using pTip-QC2-gi_21221796 to perform Protein Expression Prokaryotic cells - R. erythropolis putative tetR-family transcriptional regulatory protein

Get tips on using ExpiCHO™ Expression System Kit to perform Protein expression and purification Mammalian cells - CHO-K1 SUMO protein

A restriction enzyme or restriction endonuclease is defined as a protein that recognizes a specific, short nucleotide sequence and cuts the DNA only at or near that site, known as restriction site or target sequence. The four most common types of restriction enzymes include: Type I (cleaves at sites remote from a recognition site), Type II (cleaves within or at short specific distances from a recognition site), Type III (cleave at sites a short distance from a recognition site), and Type IV (targets modified DNA- methylated, hydroxymethylated and glucosyl-hydroxymethylated DNA). The most common challenges with restriction digest include- 1. inactivation of the enzyme, 2. incomplete or no digestion, and 3. unexpected cleavage. The enzyme should always be stored at -20C and multiple freeze-thaw cycles should be avoided in order to maintain optimal activity. Always use a control DNA digestion with the enzyme to ensure adequate activity (to avoid interference due to high glycerol in the enzyme). For complete digestion, make sure that the enzyme volume is 1/10th of the total reaction volume, the optimal temperature is constantly maintained throughout the reaction, the total reaction time is appropriately calculated based on the amount of DNA to be digested, appropriate buffers should be used to ensure maximal enzymatic activity, and in case of a double digest, make sure that the two restriction sites are far enough so that the activity of one enzyme cannot interfere with the activity of the other. Star activity (or off-target cleavage) and incomplete cleavage are potential challenges which may occur due to suboptimal enzymatic conditions or inappropriate enzyme storage. To avoid these, follow the recommended guidelines for storage and reactions, and always check for the efficacy of digestion along with purification of digested products on an agarose gel.