| Description | Microbial derived chondroitin sulfate (CS)/dermatan sulfate (DS) sugar chain degrading enzymes (CSases) belong to polysaccharide lyases, which break the β -1,4-glycosidic bond between N-acetylglucosamine (GalNAc) and hexuronic acid (GlcUA/IdoUA) through a b-elimination reaction. At the same Microbial derived chondroitin sulfate (CS)/dermatan sulfate (DS) sugar chain degrading enzymes (CSases) belong to polysaccharide lyases, which break the β -1,4-glycosidic bond between N-acetylglucosamine (GalNAc) and hexuronic acid (GlcUA/IdoUA) through a b-elimination reaction. At the same time, unsaturated double bonds are formed between the C4 and C5 carbon atoms of the uronic acid, which have characteristic absorption at 232 nm and can be conveniently used for oligosaccharide product analysis and detection. Commercialized CSases include CSase ABC from Proteus vulgaris, which can simultaneously degrade CS, DS, and HA. In fact, CSase ABC is a mixture of two enzymes, with CSase ABCI being a CS/DS endonuclease and CSase ABCII being a non reducing end exonuclease of CS/DS; CSase ACI and B from Flavobacterium heparinum, where CSase ACI is a CS and HA specific endonuclease, while the latter is a DS specific endonuclease; The CSase ACII from Arthrobacter auricens is another CS and HA specific degrading enzyme, but it is an exonuclease that can effectively cleave the enzyme labeled with tetrasaccharides at the reducing end of CS oligosaccharides after being fluorescently labeled. Therefore, it is particularly useful in CS oligosaccharides enzymatic sequencing. CS/DS lyase is not only an important tool enzyme for studying the structure-activity relationship of CS/DS and preparing CS/DS oligosaccharides, but also has significant clinical application value in the treatment of central nervous system injuries. We can provide customers with various CSases with different substrate selectivity, substrate degradation modes, and specifications according to their needs, meeting various needs such as CS/DS structural and functional analysis, product quality testing, heparin/heparan sulfate production and purification, and large-scale enzymatic hydrolysis preparation of CS and DS functional oligosaccharides... Read More | Product introduction：Used to isolate lymphocytes from human organsMatters needing attention：1. samples, reagents and experimental environment in the whole process shall be carried out at 20 ± 2 ℃. In order to obtain the best experimental results, it is best to carry out the Product introduction：Used to isolate lymphocytes from human organsMatters needing attention：1. samples, reagents and experimental environment in the whole process shall be carried out at 20 ± 2 ℃. In order to obtain the best experimental results, it is best to carry out the experiment within 2 h of sampling. The longer the sample is stored, the worse the cell separation effect is. The separation effect is even worse after the sample is placed for more than 6 h, or even cannot achieve the purpose of separation. 2. in this experiment, it is better not to use plastic products with high polymerization materials (such as polystyrene), but use non-static, low static ionization heart tubes and glass products without alkali treatment, because the electrostatic effect will lead to cell adhesion, and the surface of alkali treated glass will become rough, which will affect the effect of cell separation. 3. aspirating too many lymphocyte layers and separation liquid layers will cause the granulocytes at the junction of separation liquid to be aspirated, thus increasing the number of mixed granulocytes. 4. when the amount of separating solution is greater than that of tissue single cell suspension sample, the separation effect is better.Scope of application：Lymphocyte isolation... Read More | Proteinase K is a stable and highly reactive serine protease. Evidence from crystal and molecular structure studies indicates the enzyme belongs to the subtilisin family with an active-site catalytic triad (Asp39-His69-Ser224). It is stable in a broad range of environments: pH, buffer salts, Proteinase K is a stable and highly reactive serine protease. Evidence from crystal and molecular structure studies indicates the enzyme belongs to the subtilisin family with an active-site catalytic triad (Asp39-His69-Ser224). It is stable in a broad range of environments: pH, buffer salts, detergents (SDS), and temperature. In the presence of 0.1-0.5% SDS, proteinase K retains activity and will digest a variety of proteins and nucleases in DNA preparations without compromising the integrity of the isolated DNA.ApplicationUseful for the proteolytic inactivation of nucleases during the isolation of DNA and RNA.Removes endotoxins that bind to cationic proteins such as lysozyme and ribonuclease A.Reported useful for the isolation of hepatic, yeast, and mung bean mitochondriaDetermination of enzyme localization on membranesTreatment of paraffin embedded tissue sections to expose antigen binding sites for antibody labeling.Digestion of proteins from brain tissue samples for prions in Transmissible Spongiform Encephalopathies (TSE) research... Read More | Purity: >95%, by SDS-PAGE visualized with Coomassie® Blue Staining. Description： CD4, also known as L3T4, T4, and W3/25, is an approximately 55 kDa type I transmembrane glycoprotein that is expressed predominantly on thymocytes and a subset of mature T lymphocytes. It is a standard Purity: >95%, by SDS-PAGE visualized with Coomassie® Blue Staining. Description： CD4, also known as L3T4, T4, and W3/25, is an approximately 55 kDa type I transmembrane glycoprotein that is expressed predominantly on thymocytes and a subset of mature T lymphocytes. It is a standard phenotype marker for the identification of T cell populations. Mature human CD4 consists of a 371 amino acid (aa) extracellular region containing four immunoglobulin-like domains, a 22 aa transmembrane segment, and a 40 aa cytoplasmic domain. Within the ECD, human CD4 shares approximately 52% aa sequence identity with mouse and rat CD4. CD4 is expressed along with CD8 on double positive T cells during their development in the thymus. Either CD4 or CD8 expression is then lost, giving rise to single positive (SP) CD4+ or CD8+ mature T cells. CD4+ SP cells, also known as T helper cells, further differentiate into multiple subsets of CD4+ cells including Th1, Th2, Th17, Tfh, and Treg cells which regulate humoral and cellular immunity. CD4 is reexpressed on circulating CD8+ T cells upon activation and contributes to their cytotoxic effector activity. In human, CD4 is additionally expressed on macrophages, neutrophils, monocytes, NK cells, and neurons and glial cells in the brain. Similar CD4 distribution between species cannot be assumed as demonstrated by its presence on macrophages in human and rat but not in mouse. CD4 binds directly to MHC class II molecules on antigen presenting cells. This interaction contributes to the formation of the immunological synapse which is focused around the TCR-MHC class II-antigenic peptide interaction. Palmitoylation of two cysteine residues in the cytoplasmic tail of CD4 promotes the localization of CD4 in lipid rafts and its ability to augment TCR signaling via activation of the tyrosine kinase Lck. CD4 also functions as a chemotactic receptor for IL-16 and, in human, as a co-receptor for the gp120 surface glycoprotein of HIV-1... Read More | Purity>95% (SDS-PAGE&HPLC) Endotoxin level<0.1 EU/µgFunctionMay regulate apoptosis, cell proliferation and cell differentiation. Binds beta-galactoside and a wide array of complex carbohydrates. Inhibits CD45 protein phosphatase activity and therefore the dephosphorylation of Lyn Purity>95% (SDS-PAGE&HPLC) Endotoxin level<0.1 EU/µgFunctionMay regulate apoptosis, cell proliferation and cell differentiation. Binds beta-galactoside and a wide array of complex carbohydrates. Inhibits CD45 protein phosphatase activity and therefore the dephosphorylation of Lyn kinase.Gal-1 is also engaged in many protein-protein interactions. Gal-1 plays a number of crucial roles in neuronal cell differentiation and survival in both the central and the peripheral nervous systems, and the establishment and maintenance of T-cell tolerance and homeostasis in vivo... Read More |