Human CD272 (BTLA, B and T Lymphocyte Attenuator) is a member of the Immunoglobulin superfamily and has sequence homology to PD-1 and CTLA4. It is expressed on T and B lymphocytes and other hemopoetic lineages. Engagement of this molecule by its ligand, CD270(HVEM, a TNF superfamily member) can down regulate activated T and B cell responses. CD272 levels on antigen specific CD8+ T cells have been reported to decrease in viral specific, but not melanoma specific activated lines (1). Polymorphism of the CD272 molecule has been linked to rheumatoid arthritis (3).
Antibodies ANC6E9(cat #272-020) and ANC5A5(cat #372-020) each bind to a distinct epitope of CD272 and are suitable as a matched pair for EIA (see attachment).
Isotype: Murine IgG1k
Immunogen: Recombinant extracellular human CD272
Specificity: Antibody from clone ANC5A5 binds to CD272 on the cell surface of human PBMC in Flow cytometry, and to recombinant CD272-muIg (cat #542-020) in EIA.
Functional Application: Antibody ANC5A5 does not block binding of Biotinylated CD270(HVEM)-muIg(cat #531-030) to CD272-muIg in EIA, but appears to enhance this interaction.
References:
1) Derre’ L, DE Speiser, et al. (2010) J Clin Invest 120(1):157-167.
2) Otsuki N, Azuma M, et al. (2006) Biochem Biophys Res Com 344(4): 1121-1127.
3) Lin SC, Chan CH, et al. (2006) J Biomed Sci 13(6): 853-860.
4) Pasero C, D Olive, et al. (2009) Curr Mol Med 9(7): 911-927.
5) Gavrieli M, KM Murphy, et al. (2006) Adv Immunol 92: 152-185.
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核酸是天然高分子化合物，，糖类中的多糖（淀粉、纤维素、糖原等）也是天然高分子化合物
同属于生命的六大营养物质（水，无机盐，糖类，脂质，核酸，蛋白质）
1.CA15-3属于多形上皮黏蛋白。CA15-3测定广泛用于乳腺癌的辅助诊断。60%～80％进展期乳腺癌患者的CA15-3浓度大30kU/L。CA15-3有助于判断肿瘤的进展和疗效，测定值大于1000kU/L者预后不良。在乳腺癌初期其灵敏度较低，在Ⅲ期时约为12%，因此CA15-3测定不能用作乳腺癌的筛选手段．当怀疑乳腺癌而CA15-3又正常时，可以结合CEA值进行考虑。应注意到治疗后由于肿瘤细胞死亡，CA15-3起初会升高，然后才逐渐下降。持续不降或上升者则提示病情恶化。
2．其他恶性肿瘤，如肺、结肠、胰腺、肝脏、卵巢癌、子宫颈和子宫内膜的恶性肿瘤也都可见到CA15-3不同程度的阳性率（低于10%）。
3．肝硬化、肝炎、结节病、结核病、自身免疫性疾病（SLE)以及卵巢、乳腺的良性病变中，CA15-3值略高于正常范围，但阳性率一般低于10%，妊娠中后期，有近一半孕妇血清CA15-3升高。
还有如果用气相做糖的鉴别的话，需要样品量大不大？怎么衍生化？
不好意思，我是学药分的，对植化比较外行，请详细些，谢了先！
一般情况下同时测定蔗糖、果糖和葡萄糖。
选用哪种检测器呐。
本来经战友的意见已决定用示差了，但突然有个经销商愿意以比较优惠的价格卖蒸发光给我们，所以又开始犹豫了。
最后一次请教各位战友，如题目。谢谢！！
