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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）懂得一些道理或知识.
让世界充满爱不仅是付出,还可以是回报,回报你所关爱的人.
我记得有首歌曲,它的意思是爸爸妈妈辛苦了一天,回到家,帮他们拿拖鞋,帮他们倒杯茶,这是感
恩.老师批改作业累了,可以给他们捶捶背,当学习获得了一定的成功,老师会感到欣慰,这是感恩.当
同学遭遇困难时,你可以去用尽全力地安慰帮助他（她）,使他（她）能够解决困难,克服困难,变得快
乐.这也是感恩.
这个“类”是什么意思？
