Biotinylated Human Transferrin Protein, His,Avitag? (MALS verified)
分子別名(Synonym)
Transferrin,TF,DKFZp781D0156,PRO1557,PRO2086
表達區(qū)間及表達系統(tǒng)(Source)
Biotinylated Human Transferrin Protein, His,Avitag (TRN-H82E3) is expressed from human 293 cells (HEK293). It contains AA Val 20 - Pro 698 (Accession # P02787).
Predicted N-terminus: Val 20
蛋白結構(Molecular Characterization)
This protein carries a polyhistidine tag at the C-terminus, followed by an Avi tag (Avitag?)
The protein has a calculated MW of 78.8 kDa. The protein migrates as 70-85 kDa under reducing (R) condition (SDS-PAGE) due to glycosylation.
標記(Labeling)
Biotinylation of this product is performed using Avitag? technology. Briefly, the single lysine residue in the Avitag is enzymatically labeled with biotin.
蛋白標記度(Protein Ratio)
Passed as determined by the HABA assay / binding ELISA.
內毒素(Endotoxin)
Less than 1.0 EU per μg by the LAL method.
純度(Purity)
>90% as determined by SDS-PAGE.
>90% as determined by SEC-MALS.
制劑(Formulation)
Lyophilized from 0.22 μm filtered solution in PBS, pH7.4 with trehalose as protectant.
Contact us for customized product form or formulation.
重構方法(Reconstitution)
Please see Certificate of Analysis for specific instructions.
For best performance, we strongly recommend you to follow the reconstitution protocol provided in the CoA.
存儲(Storage)
For long term storage, the product should be stored at lyophilized state at -20°C or lower.
Please avoid repeated freeze-thaw cycles.
This product is stable after storage at:
-20°C to -70°C for 12 months in lyophilized state;
-70°C for 3 months under sterile conditions after reconstitution.
背景(Background)
轉鐵蛋白也稱為血清轉鐵蛋白、β-1金屬結合球蛋白、TF,是控制生物體液中游離鐵水平的鐵結合血漿糖蛋白。雖然與轉鐵蛋白結合的鐵不到全身鐵的0.1%(4mg),但它是最重要的鐵庫,周轉率最高(25mg/24h)。轉鐵蛋白對Fe(III)的親和力極高(pH 7.4時為1023 M?1),但隨著pH值降至中性以下而逐漸降低。當不與鐵結合時,它被稱為“脫輔基轉鐵蛋白”。在人類中,轉鐵蛋白由一條含有679個氨基酸的多肽鏈組成。它是一個由α螺旋和β折疊組成的復合物,形成兩個結構域(第一個位于N端,第二個位于C端)N端和C端序列由球形裂片表示,兩個裂片之間有一個鐵結合位點。肝臟是制造轉鐵蛋白的主要來源,但大腦等其他來源也會產(chǎn)生這種分子。轉鐵蛋白也與先天免疫系統(tǒng)有關。轉鐵蛋白存在于粘膜中并與鐵結合,從而創(chuàng)造了一個游離鐵含量低的環(huán)境,阻礙了細菌在鐵抑制過程中的存活。炎癥時轉鐵蛋白水平降低。轉鐵蛋白的金屬結合特性對人體钚的生物化學有很大影響。轉鐵蛋白對細菌具有殺菌作用,因為它使細菌無法獲得Fe3+。碳水化合物缺乏的轉鐵蛋白隨著大量乙醇的消耗而在血液中增加,可以通過實驗室檢測進行監(jiān)測。
關鍵字: Transferrin;Transferrin蛋白;轉鐵蛋白;ACRO;百普賽斯;
百普賽斯集團ACROBiosystems Group(股票代碼:301080)是成立于2010年的跨國生物科技公司,是為全球生物醫(yī)藥、健康產(chǎn)業(yè)領域提供關鍵生物試劑產(chǎn)品及解決方案的行業(yè)平臺型基石企業(yè)。2021年在創(chuàng)業(yè)板上市。百普賽斯集團業(yè)務遍布全球,橫跨亞洲、北美洲、歐洲,在中國、美國、瑞士等12個城市設有辦公室、研發(fā)中心及生產(chǎn)基地。目前累計服務客戶超6000家,與全球Top 20醫(yī)藥企業(yè)均建立了長期、穩(wěn)定的合作伙伴關系。集團旗下?lián)碛衅放艫CROBiosystems百普賽斯、bioSeedin柏思薈、Condense Capital墾拓資本和ACRODiagnostics百斯醫(yī)學等。