Product Name	Anti-CD28/Gold
Chinese Name	胶体金标记的CD28抗体
Alias	CD 28; CD28 antigen; CD28 molecule; MGC138290; T cell antigen CD28; T cell specific surface glycoprotein; T cell specific surface glycoprotein CD28; Tp44.
Research Area	Cell biology  immunology  Stem cells  Cell adhesion molecule  Cell Surface Molecule  lymphocyte  t-lymphocyte  b-lymphocyte
Immunogen Species	Rabbit
Clonality	Polyclonal
React Species	Mouse, Rat,  (predicted: Human, Chicken, Dog, Pig, Cow, Horse, )
Applications	IEM=1:20-200 ICA=1:20-200 ChIP=1:20-200  not yet tested in other applications. optimal dilutions/concentrations should be determined by the end user.
Molecular weight	25kDa
Form	Lyophilized or Liquid
Concentration	0.4mg/ml
immunogen	KLH conjugated synthetic peptide derived from mouse CD28
Lsotype	IgG
Purification	affinity purified by Protein A
Storage Buffer	0.02M TBS(pH8.2) with 1% BSA, 0.03% Proclin300.
Storage	Store at 2-8 ºC for 3-6 months. Avoid repeated freeze/thaw cycles.
Product Detail	background: Human CD28 antigen is a 44 kDa disulfide linked homodimeric T cell specific surface glycoprotein. It is a cell adhesion molecule of the immunoglobulin superfamily which is constitutively expressed on most peripheral blood T lymphocytes (approximately 95% of CD4+ cells and 50% of CD8+ cells). Mature thymocytes exhibit higher levels of CD28 than the immature cells. Activation of T cells results in enhanced CD28 expression. T cell activation requires two combined signals provided by antigen presenting cells. The first is mediated via the T cell receptor following its interaction with antigenic peptide MHC complexes, and the second is delivered by accessory or costimulating molecules through their counter receptors on T lymphocytes. CD28 bears structural homology to CTLA 4 which is expressed at very low levels on the surface of CD4+ and CD8+ peripheral blood cells only following activation. CD28 is the natural receptor for the B7/BB 1 ligand (CD80) a 55-60 kDa glycoprotein which is expressed on activated B lymphocytes, on dendritic cells and on interferon gamma treated monocytes. The binding of B7 1/BB 1 molecules to CD28 is involved in T lymphocyte activation and in the initiation and maintenance of chronic inflammation. Function: Possibly involved in T-cell activation. Subunit: Homodimer; disulfide-linked. Interacts with DUSP14. Binds to CD80/B7-1 and CD86/B7-2/B70. Subcellular Location: Membrane; Single-pass type I membrane protein. Similarity: Contains 1 Ig-like V-type (immunoglobulin-like) domain. Database links: Entrez Gene: 940 Human Entrez Gene: 12487 Mouse Omim: 186760 Human SwissProt: P10747 Human SwissProt: P31041 Mouse SwissProt: P42069 Rabbit Unigene: 591629 Human Unigene: 255003 Mouse Important Note: This product as supplied is intended for research use only, not for use in human, therapeutic or diagnostic applications. CD28是免疫球蛋白超家族成员之一 ，为T细胞特异性由二硫键连接的同源二聚体表面glycoprotein，主要分布在外周血lymphocyte。对迟发型超敏反应以及Tc介导的细胞毒作用都有免疫调节作用。

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