产品说明
DescriptionFactor XI Polyclonal Antibody – SheepAffinity’s Factor XI Polyclonal Antibody – Sheep is the base level of our Factor XI antibody family. The purity of IgG is typically 90% and is provided in a solution of HEPES buffered saline containing 50% glycerol (v/v). The titre is essentially the same as the starting antiserum and each vial typically contains the amount of IgG recovered from one milliliter of antiserum. This Factor XI Polyclonal Antibody – Sheep is generally intended for use in applications such as immuno-precipitation, immuno-electrophoresis, immuno-depletion and activity neutralization assays.Product Code: SAFXI-IGRetail Product Size: 5mg vialHost Animal: Sheep Anti-Human Factor XI Polyclonal AntibodySpecies Cross Reactivity: View ChartProduct Datasheet: Factor XI F11 Polyclonal Antibody, purified anti-human sheep IgGDescription of Factor XI (FXI)Factor XI (FXI, plasma thromboplastin antecedent) is a coagulation protein produced in the liver that circulates in plasma at approximately 5 μg/mL (30 nM). The mass of FXI is 160 kDa as determined by SDS-PAGE under non-reducing conditions and 80 kDa upon reduction. FXI consists of two identical 80 kDa subunits linked by disulphide bonds. Each subunit consists of a tandem repeat of four apple domains followed by a serine protease catalytic domain. Cleavage of FXI by activated factor XII or thrombin converts each subunit into a two-chain form and generates two active sites per FXIa molecule. The mass of FXIa is 160 kDa unreduced, but upon reduction FXIa migrates as a heavy chain of 50 kDa and a light chain of 30 kDa. The catalytic site of FXIa resides in the light chain. In plasma, FXI or FXIa circulates in non-covalent 1:1 complex with high molecular weight kininogen, which acts as a cofactor in the activation of FXI by activated factor XII. The activity of FXIa is regulated by platelets and by several proteinase inhibitors including, in order of decreasing importance, C1-inhibitor, α2antiplasmin, α1antitrypsin and antithrombin. Heparin has relatively little effect on the rate of inhibition of FXIa by antithrombin. The only known natural substrate for activated FXI (FXIa) is factor IX (Christmas factor) and the only cofactor required for this reaction is ionized calcium1-3.References and ReviewWuillemin WA, Minnema M, Meijers JCM, Roem D, Erenberg AJM, Nuijens JH, ten Cate H, Hack EC; Inactivation of Factor XIa in Human Plasma Assessed by Measuring Factor XIa-Protease Inhibitor Complexes: Major Role for C1-Inhibitor. Blood 85:1517, 1995.DeLa Cadena R, Watchtfogel YT, Colman RW, in Hemostasis and Thrombosis, 3rd Edition, eds. RW Colman, J Hirsh, VJ Marder and EW Salzman, pp. 219-240, J.B. Lippincott Co., Philadelphia, 1994.Baglia FA, Seaman FS, Walsh, PN; The Apple 1 and 4 domains of Factor XI Act to Synergistically Promote the Surface-Mediated Activation of Factor XI by Factor XIIa. Blood 85:2078, 1995.
Affinity Biologics生产针对凝血,止血和纤维蛋白溶解相关蛋白的全系列多克隆抗体。我们的多克隆抗体家族有多种形式。完整或纯化的IgG,亲和纯化的IgG,辣根过氧化物酶偶联,异硫氰酸荧光素(FITC)偶联和生物素偶联。所有与凝血,止血和纤维蛋白溶解相关蛋白以及缺乏因子的血浆产品有关的Affinity Biologicals多克隆抗体均在内部采购,并根据ISO13485医疗设备质量保证标准生产。
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