| Description | Product InfoQuality Control Tests:For catenated KDNA substrate, at least 90% of the DNA will be retained in the well of a 1% agarose gel.Decatenation of each batch of kDNA is tested with purified topoisomerase II.DescriptionAssays employing crude extracts for topo II activity based upon relaxation Product InfoQuality Control Tests:For catenated KDNA substrate, at least 90% of the DNA will be retained in the well of a 1% agarose gel.Decatenation of each batch of kDNA is tested with purified topoisomerase II.DescriptionAssays employing crude extracts for topo II activity based upon relaxation of supercoiled DNA can be complicated due to the presence of topo I in partially purified fractions. Additional complications arise with contaminating nuclease activity (due to Mg++) which degrade or nick the supercoiled substrate. These problems can be avoided by using a catenated DNA substrate prepared from the kinetoplast of the insect trypanosome Crithidia fasciculata. KDNA is an aggregate of interlocked DNA minicircles (mostly 2.5 kb) that form extremely large networks of high molecular weight. As a result, these networks fail to enter an agarose gel. Upon incubation with topo II, which engages DNA in a double stranded breaking and reunion cycle, minicircular DNAs are effectively released (decatenated). The decatenated minicircles move rapidly into the gel owing to their small size. This reaction will not occur with topoisomerase I. TopoGEN has modified the original gel system described by Miller et al. (see below) to allow additional discrimination of activities using kDNA. Shipping&storageThe marker is shipped at ambient temperature and should be stored a 4°C... Read More | Inquire | 1、Product attributeReaction time：short (up to 20 minutes) at 20-37°CLot-to-lot variation：<5%Boiling point : 100℃pH-Value (at 20 °C): 3.5-4.0Density (20℃) : 1.0111 g/cm³Appearance: colourless to pale blue liquidOdour: odourlessRecommend Incubation 1、Product attributeReaction time：short (up to 20 minutes) at 20-37°CLot-to-lot variation：<5%Boiling point : 100℃pH-Value (at 20 °C): 3.5-4.0Density (20℃) : 1.0111 g/cm³Appearance: colourless to pale blue liquidOdour: odourlessRecommend Incubation temperature: 20-37 °C2、Requirements for storage rooms and vessels1.Keep container tightly closed.2.Keep cool. protected from light3.Keep/Store only in original container.4.Never return spills in original containers for reuse.5. Keep away from: Food and feeding stuffs3、It is a ready-to-use, labelling-free TMB-substrate solution.4、Biosafety informationThis mixture is not classified as hazardous in accordance with Regulation (EC) No 1272/2008；5、Advantage1. Very high absorbance yield2. Very low background signals3. Certified long-term stability4. Regeneration following light exposure... Read More | Inquire | Purity:>95%, by SDS-PAGE visualized with Coomassie® Blue Staining.Description：HSPD1, also known as HSP60, is a member of the chaperonin family. HSPD1 may function as a signaling molecule in the innate immune system. This protein is essential for the folding and assembly of newly Purity:>95%, by SDS-PAGE visualized with Coomassie® Blue Staining.Description：HSPD1, also known as HSP60, is a member of the chaperonin family. HSPD1 may function as a signaling molecule in the innate immune system. This protein is essential for the folding and assembly of newly imported proteins in the mitochondria. It may also prevent misfolding and promote the refolding and proper assembly of unfolded polypeptides generated under stress conditions in the mitochondrial matrix. HSPD1 gene is adjacent to a related family member and the region between the 2 genes functions as a bidirectional promoter. Several pseudogenes have been associated with this gene. Mutations associated with this gene cause autosomal recessive spastic paraplegia 13. Defects in HSPD1 are a cause of spastic paraplegia autosomal dominant type 13 (SPG13). Spastic paraplegia is a degenerative spinal cord disorder characterized by a slow, gradual, progressive weakness and spasticity of the lower limbs. Defects in HSPD1 are the cause of leukodystrophy hypomyelinating type 4 (HLD4); also called mitochondrial HSP60 chaperonopathy or MitCHAP-60 disease. HLD4 is a severe autosomal recessive hypomyelinating leukodystrophy. HSPD1 is clinically characterized by infantile-onset rotary nystagmus, progressive spastic paraplegia, neurologic regression, motor impairment, profound mental retardation. Death usually occurs within the first two decades of life... Read More |