Fas (fibroblast associated; also known as APO-1 or CD95) is a member of the death receptor subfamily of the TNF receptor superfamily and is designated TNFRSF6. The human Fas precursor is 335 aa in length, and contains a 25 aa signal peptide, a 148 aa extracellular domain (ECD), a 17 aa transmembrane sequence, and a 145 aa cytoplasmic region. The ECD possesses three cysteine-rich TNFR repeats, while the cytoplasmic region contains one death domain (DD) that is required for the transduction of apoptotic signals (4). Human Fas ECD shares 55%, 58% 62% 63% and 64% aa sequence identity with mouse, rat, feline, bovine and porcine Fas ECD, respectively. A human Fas isoform of 314 aa that lacks the transmembrane sequence is secreted by resting lymphocytes, while isoforms of 149, 132, 103 and 86 aa that also lack the DD and show substitutions for parts of the TNFR repeats are less prominently expressed. All five isoforms block the extrinsic apoptosis pathway induced by Fas ligand binding. Fas ligand (FasL; also TNFSF6) is a type II transmembrane protein that belongs to the TNF family and is expressed on activated T-cells, NK cells, and cells found in immune privileged sites. Alternatively, FasL is also shed as a soluble form. Engagement of Fas induces oligomerization of preformed Fas trimers. This activated receptor complex recruits the adaptor molecule FADD to form the Death-Inducing Signaling Complex (DISC). Upon activation, caspases in the DISC initiate the apoptotic signaling cascade. Fas is prominent in epithelial cells, hepatocytes, activated mature lymphocytes, virus-transformed lymphocytes and tumor cells. It is an essential mediator in the activation-induced death of T lymphocytes that terminates the immune reaction.

產品性質

運輸與保存方法

冰袋運輸。-20℃至-80℃保存，一年有效期。

復溶后，-20 至 -80°C，在未開封狀態下保存 3-6 個月。復溶后，2-8°C 保存 2-7 天。

建議第一次使用時分裝凍存，避免反復凍融。

注意事項

1. 避免反復凍融。

2. 為了您的安全和健康，請穿實驗服并戴一次性手套操作。

3. 本產品僅作科研用途！

產品數據

Tris-Bis PAGE

HB220624