生物學功能纖維蛋白原在凝血過程中起到?jīng)Q定性作用。當血管受損時,凝血酶激發(fā)纖維蛋白原,轉化為不溶性的纖維蛋白,形成穩(wěn)定的凝塊,從而實現(xiàn)止血。醫(yī)學應用凝血障礙纖維蛋白原注射液可用于先天性或獲得性纖維蛋白原缺乏癥,以及手術中的異常出血。功能性食品添加劑免疫球蛋白因其特殊的免疫生理功能,被研究作為功能性食品添加劑。藥物載體牛血清白蛋白(BSA)常作為藥物分子的載體,用于研究藥物在體內的運輸和代謝過程。前景展望隨著蛋白質工程技術的發(fā)展,牛血漿中纖維蛋白原的大規(guī)模生產(chǎn)和應用前景廣闊。未來研究應著重于提高提取效率、降低成本,并擴大其在新藥開發(fā)、組織工程和診斷學等領域的應用。結論牛血漿中的纖維蛋白原不僅在凝血過程中發(fā)揮著關鍵作用,而且在醫(yī)學研究中具有重要價值。通過優(yōu)化提取和純化工藝,可以更好地利用這一資源,為人類健康做出貢獻。Kex2不能識別和切割單一堿性氨基酸即精氨酸或賴氨酸的羧基端肽鍵。Recombinant Human AITR Ligand/TNFSF18
RecombinantBiotinylatedHumanKIR2DL1Protein,His-AviTag性能參數(shù)分子別名(Synonyms)CD158A;CD158Ankat1;cl-42表達區(qū)間及表達系統(tǒng)(Source)BiotinylatedHumanKIR2DL1ProteinisexpressedfromHEK293withHistagandAvitagattheC-Terminus.ItcontainsHis22-Arg242.[Accession|P43626]分子量大?。∕olecularWeight)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.儲存條件Theproductshouldbestoredat-25~-15℃for1yearfromdateofreceipt.2-7days,2~8°Cundersterileconditionsafterreconstitution.Recombinant Human CARHSP1 Protein成纖維細胞生長因子18(FGF-18)是20 kDa蛋白,在骨骼發(fā)育和骨穩(wěn)態(tài)中起著重要作用。
RecombinantBiotinylatedHumanHLA-A*03:01&B2M&KRASG12V(VVGAVGVGK)MonomerProtein,His-AviTag性能參數(shù)分子別名(Synonyms)MHC;KRAS;K-Ras2;KRAS2;C-K-RAS;CFC2;K-RAS2A;K-RAS2B;K-RAS4A;K-RAS4B;KRAS1;KRAS2;NS;NS3;RASK2;GTPaseKras;KI-RAS;RALD表達區(qū)間及表達系統(tǒng)(Source)BiotinylatedHumanHLA-A*03:01&B2M&KRASG12V(VVGAVGVGK)MonomerProteinisexpressedfromHEK293withHistagandAvitagattheC-TerminusItcontainsGly25-Thr305(HLA-A*03:01),Ile21-Met119(B2M)andVVGAVGVGKpeptide.[Accession|NP_002107.3(HLA-A*03:01)&P61769(B2M)&VVGAVGVGK]分子量大?。∕olecularWeight)TheproteinhasapredictedMWof50.09kDa.Duetoglycosylation,theproteinmigratesto51-60kDabasedonSDS-PAGEresult.(Endotoxin)Lessthan1EUperμgbytheLALmethod.純度(Purity)>95%asdeterminedbySDS-PAGEandHPLC.制劑(Formulation)Suppliedas0.22μmfilteredsolutioninPBS(pH7.4).
SARS-CoV-2,whichcausestheglobalpandemiccoronavirusdisease2019(Covid-19),belongstoafamilyofvirusesknownascoronaviruses.TheSARS-CoV-2Sproteinisaglycoproteinthatmediatesmembranefusionandviralentry.TheRBDofSARS-CoV-2bindsametallopeptidase,angiotensin-convertingenzyme2(ACE-2).SeveralemergingSARS-CoV-2genomeshavebeenidentifiedincludingtheOmicron,orB.1.1.529,variant.FirstidentifiedinNovember2021inSouthAfrica,theOmicronvariantquicklybecamethepredominantSARS-CoV-2variantandisconsideredavariantofconcern(VOC).TheOmicronvariantcontains15mutationsinRBDdomainthatpotentiallyaffectviralfitnessandtransmissibility.ThemajorityofthemutationsareinvolvedinACE-2bindingandOmicronbindsACE-2withgreateraffinity,potentiallyexplainingitsincreasedtransmissibility.Severalofthesemutationsarealsoidentifiedinfacilitatingimmuneescapeandreducingneutralizationactivitytoseveralmonoclonalantibodies.透明質酸及其衍生物由于其生物相容性和生物降解性,被用作藥物的控釋載體。
IdeSProtease全稱免疫球蛋白G降解酶,酶活(Enzymeactivity)40U/μL酶活定義(UnitDefinition)在37℃條件下,反應30min,剪切>95%的1μg重組單克隆IgG所需要的酶量定義為一個活性單位。儲存條件-25~-15℃保存,有效期1年。使用方法1.在消化液中加入適量IgG(加至5mg);2.在IgG樣本中加入IdeS蛋白酶(每1μgIgG加入1個單位的IdeS);3.將樣品置于37℃孵育30-60min。IdeS蛋白酶在中性pH或接近中性pH的緩沖中活性強。推薦反應緩沖是50mM磷酸鈉,150mMNaCl(pH6.6),多數(shù)常見的生物緩沖也適用,比如Tris或PBS;注意:不在此pH范圍(例如乙酸鹽緩沖液)的緩沖也可能適用,但是孵育時間或酶量需要根據(jù)實際情況進行優(yōu)化。注意事項1.IdeS不能識別切割小鼠IgG1/IgG2b,大鼠、豬、牛和山羊IgG,對小鼠IgG2a和IgG3具有中等酶切活性,酶切小鼠IgG2a和IgG3建議增加IdeS的用量(推薦用量為正常用量的5-10倍)。2.IdeS不能切割非IgG亞型的單抗分子,包括IgA、IgM、IgD和IgE。(CDNF)也是一種新型神經(jīng)營養(yǎng)因子,對多巴胺能神經(jīng)元的強大活性,與神經(jīng)膠質細胞系衍生的(GDNF)相當。Recombinant Mouse IGFBP-3R Protein,hFc Tag
α-凝血酶的多面性質在其臨床使用中提出了挑戰(zhàn),特別是在平衡其止血效果與血栓形成風險之間。Recombinant Human AITR Ligand/TNFSF18
RecombinantBiotinylatedHumanHLA-A*02:01&B2M&MAGE-A4orMAGE-A8(KVLEHVVRV)MonomerProtein,His-AviTag性能參數(shù)分子別名(Synonyms)MAGE-A4orMAGE-A8;MAGE-A4;MAGE-A8;表達區(qū)間及表達系統(tǒng)(Source)BiotinylatedHumanHLA-A*02:01&B2M&MAGE-A4orMAGE-A8(KVLEHVVRV)MonomerProteinisexpressedfromHEK293withHistagandAvitagattheC-Terminus.ItcontainsGly25-Thr305(HLA-A*02:01),Ile21-Met119(B2M)andKVLEHVVRVpeptide.[Accession|A0A140T913(HLA-A*02:01)&P61769(B2M)&KVLEHVVRV]分子量大小(MolecularWeight)TheproteinhasapredictedMWof50.50kDa.Duetoglycosylation,theproteinmigratesto52-62kDabasedonSDS-PAGEresult.(Endotoxin)Lessthan1EUperμgbytheLALmethod.純度(Purity)>95%asdeterminedbySDS-PAGEandHPLC.制劑(Formulation)Suppliedas0.22μmfilteredsolutioninPBS(pH7.4).儲存條件Theproductshouldbestoredat-85~-65℃for1yearfromdateofreceipt.Recombinant Human AITR Ligand/TNFSF18