SARS-CoV-2, which causes the global pandemic coronavirus disease 2019 (Covid-19), belongs to a family of viruses known as coronaviruses that also include MERS?CoV and SARS-CoV-1. Coronaviruses are commonly comprised of four structural proteins: Spike protein (S), Envelope protein (E), Membrane protein (M) and Nucleocapsid protein (N). The SARS-CoV-2 S protein is a glycoprotein that mediates membrane fusion and viral entry. The S protein is homotrimeric, with each ~180-kDa monomer consisting of two subunits, S1 and S2 .The RBD of SARS-CoV-2 binds a metallopeptidase, angiotensin-converting enzyme 2 (ACE-2). Before binding to the ACE-2 receptor, structural analysis of the S1 trimer shows that only one of the three RBD domains is in the "up" conformation. This is an unstable and transient state that passes between trimeric subunits but is nevertheless an exposed state to be targeted for neutralizing antibody therapy. Polyclonal antibodies to the RBD of the SARS-CoV-2 protein have been shown to inhibit interaction with the ACE-2 receptor, confirming RBD as an attractive target for vaccinations or antiviral therapy.  α-凝血酶（α-Thrombin）可以啟動XIII因子和血小板，或者用作血管收縮劑。Recombinant Mouse Pentraxin 2/SAP Protein,hFc Tag

CD40,alsoknownasTNFRSF5,isa45-50kDatypeItransmembraneglycoproteinmemberoftheTNFreceptorsuperfamily.MaturehumanCD40consistsofa173aminoacid(aa)extracellulardomain,atransmembranedomain,anda62aacytoplasmicdomain.CD40servesmultiplefunctionsinbothhematopoieticandepithelialcancersandisatargetfortumorimmunotherapy.DysregulationofCD40/CD40LigandexpressionandinteractionscontributestotheimmunedeficiencyassociatedwithHIVinfectionandAIDS.Itisalsoimplicatedinthepathologyofmultiplecardiovasculardiseasesincludingatherosclerosis,atherothrombosis,andrestenosis.產品性質別名CD40;CD40Lreceptor;TNFRSF5;CD40antigen;CD40molecule;CDw40;MGC9013;UniprotNo.P25942表達區間及表達系統RecombinantBiotinylatedHumanCD40/TNFRSF5ProteinisexpressedfromHEK293CellswithHistagandAvitagattheC-terminal.ItcontainsGlu21-Arg193.分子量Approximately22.1kDa.Duetoglycosylation,theproteinmigratesto35-40kDabasedonTris-BisPAGEresult.純度>95%asdeterminedbySDS-PAGEandHPLC.活性Recombinant Mouse Pentraxin 2/SAP Protein,hFc TagLAG-1與MIP-1β（ACT II同種型）相同，Lag-1趨化吸引力單核細胞，并表現出活性作為HIV抑制因子。

重組腸激酶（rEK）是一種高純度的重組牛腸激酶輕鏈片段，氨基酸序列與牛腸激酶輕鏈一致，有著和天然提取的腸激酶同樣特異的酶切位點，切割位點Asp-Asp-Asp-Asp-Lys，可去除位于蛋白N-末端的融合蛋白，以除去不需要的融合標簽，同時重組腸激酶（rEK）具有比天然酶更高的切割活性。重組腸激酶為采用重組大腸桿菌分泌表達的高純度、高活性、高特異的牛腸激酶，不含其他蛋白酶，可以在較寬pH范圍（4.5-9.5）和較寬溫度范圍內有效切割融合蛋白，并且在各種去垢劑和變性劑存在的條件下仍具有部分活性。本品不含標簽，由于具有極高酶切活性，酶切反應使用量少，不影響下游蛋白應用，可不考慮除去。產品信息規格100U/200U/500U/1000U/5000U產品性質來源（Source）大腸桿菌表達分子量（MolecularWeight）理論值25.85kDa外觀（Appearance）澄清、無色至淡黃色液體酶濃度（EnzymeConcentration）≥5U/uL活性定義（ActivityDefinition）一個活性單位定義為25°C，12-16h，

Recombinant Biotinylated Human KIR2DL1 Protein,His-Avi Tag性能參數分子別名（Synonyms）CD158A;CD158Ankat1;cl-42表達區間及表達系統（Source）BiotinylatedHumanKIR2DL1ProteinisexpressedfromHEK293withHistagandAvitagattheC-Terminus.ItcontainsHis22-Arg242.[Accession|P43626]分子量大小（MolecularWeight）TheproteinhasapredictedMWof27.1kDa.Duetoglycosylation,theproteinmigratesto48-60kDabasedonSDS-PAGEresult.（Endotoxin）Lessthan1EUperμgbytheLALmethod.純度（Purity）>95%asdeterminedbySDS-PAGEandHPLC.制劑（Formulation）Lyophilizedfrom0.22μmfilteredsolutioninPBS(pH7.4).Normally8%trehaloseisaddedasprotectantbeforelyophilization.重構方法（Reconstitution）Centrifugethetubebeforeopening.Reconstitutingtoaconcentrationmorethan100μg/mlisrecommended.Dissolvethelyophilizedproteinindistilledwater.UbcH3還有兩個泛素結合位點UBS1(來自aa 205-215)和UBS2(來自aa 216-225)，以及一個c端酸性尾部結構域。

Angiotensin I Converting Enzyme (ACE-2), also called ACEH (ACE homologue), is a dimeric, zinc-dependent metalloprotease of the ACE family that also includes somatic and germinal ACE. ACE-2 mRNA is found at high levels in heart, testis, and kidney and at lower levels in a wide variety of tissues. ACE-2 is the SARS-CoV and SARS-CoV2 Spike protein receptor in vivo, functions catalytically as a carboxypeptidase to cleave several substrates including angiotensins I and II, and acts as a partner for B0AT1-family amino acid transporters. Through these functions, ACE-2 has been shown to be involved in several diseases including SARS, COVID19, acute lung injury, heart disease, liver and lung fibrosis, inflammatory lung disease, and cardiopulmonary disease . Full length ACE-2 protein includes an extracellular region composed of a single N-terminal peptidase domain and C-terminal collectrin-like domain (CLD), a transmembrane domain, and a short cytoplasmic tail. The N-terminal peptidase region is required for binding to SARS-CoV and SARS-CoV2 spike proteins, while the CLD contains a region that promotes dimerization and association with amino acid transporters.IdeS 具有獨特的底物選擇性，可以作為工具酶應用于抗體類藥物或抗體融合蛋白藥物的結構表征分析。Recombinant Mouse Pentraxin 2/SAP Protein,hFc Tag

通過泛素-蛋白體途徑(UPP)中的酶與底物蛋白共價連接，并在26S蛋白體降解ATP依賴的細胞蛋白中發揮主要作用。Recombinant Mouse Pentraxin 2/SAP Protein,hFc Tag

產品描述纖維蛋白原（Fibrinogen，Fg），即凝血因子I，分子量約340kDa，由α、β、γ三對不同多肽鏈組成，多肽鏈間以二硫鍵相連。α鏈分子量63.5kDa，β鏈分子量56kDa，γ鏈分子量47kDa，纖維蛋白原約含4%碳水化合物。纖維蛋白原參與凝血的原理：在凝血酶作用下，α鏈與β鏈分別釋放出A肽與B肽，生成纖維蛋白單體。在此過程中，由于釋放了酸性多肽，負電性降低，單體易于聚合成纖維蛋白多聚體，但此時單體之間借氫鍵與疏水鍵相連，尚可溶于稀酸和尿素溶液中。進一步在Ca2+與活化的ⅩⅢ因子作用下，單體之間以共價鍵相連，則變成穩定的不溶性纖維蛋白凝塊，完成凝血過程。來源于不同物種（如來源于牛、貓、狗、豚鼠、人、綿羊、小鼠和大鼠等）的纖維蛋白原具有相似的結構和性質。因此，一般來源于一種哺乳動物的纖維蛋白原可與其他來源的凝血酶交叉反應，相反地來自一種哺乳動物蛋白的凝血酶液也可注入多種動物，發生凝血反應。Recombinant Mouse Pentraxin 2/SAP Protein,hFc Tag

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