{"product_id":"abcam-ab286013","title":"Abcam, ab286013, Recombinant human CD28 protein (Active)","description":"\u003cp\u003eSize: 10µg \/ 100µg\u003cbr\u003e\nRecombinant human CD28 protein (Active) is a Human Fragment protein, in the 19 to 152 aa range, expressed in HEK 293 cells, with \u0026gt;95%, \u0026lt; 0.2 EU\/µg endotoxin level, suitable for SDS-PAGE, FuncS.\u003cbr\u003e\nKey facts\u003cbr\u003e\nPurity:\u0026gt;95% SDS-PAGE,\u003cbr\u003e\nEndotoxin level:\u0026lt; 0.2 EU\/µg,\u003cbr\u003e\nExpression system:HEK 293 cells,\u003cbr\u003e\nTags:Fc tag C-Terminus,\u003cbr\u003e\nApplications:SDS-PAGE, FuncSSee reactivity dataSee the reactivity data table below for information on validated species and application combinations.,\u003cbr\u003e\nBiologically active:Yes,\u003cbr\u003e\nBiological activity:Human biotinylated CD80, Fc Tag can bind to immobilized human CD28, Fc Tag at 1 μg\/mL, 100 μL\/well with a linear range of 0.03 – 0.81 μg\/mL.,\u003cbr\u003e\nAccession:P10747,\u003cbr\u003e\nAnimal free:No,\u003cbr\u003e\nCarrier free:No,\u003cbr\u003e\nSpecies:Human,\u003cbr\u003e\nReconstitution:Reconstitute in PBS, 0.1% BSA,\u003cbr\u003e\nStorage buffer:pH: 7.4Constituents: 95% PBS, 5% Trehalose\u003c\/p\u003e\n\n\u003cp\u003eProduct details:\u003cbr\u003e\nThis product is manufactured by BioVision, an Abcam company and was previously called 9237 Human CellExp™ CD28, Human Recombinant. 9237-100 is the same size as the 100 μg size of ab286013.\u003c\/p\u003e\n\n\u003cp\u003eProperties and Storage Information:\u003cbr\u003e\nShipped at conditions-Blue Ice, Appropriate short-term storage conditions--20°C, Appropriate long-term storage conditions--20°C\u003c\/p\u003e\n\n\u003cp\u003eSupplementary Information:\u003cbr\u003e\nThis supplementary information is collated from multiple sources and compiled automatically.\u003cbr\u003e\nCD28 also known as T-cell-specific surface glycoprotein CD28 or TP44 plays an important role as a co-stimulatory receptor on T cells. This glycoprotein has a molecular mass of about 44 kDa and is located mainly on the cell surface of T cells. CD28 expression also occurs on thymocytes and some B cells. It forms part of the immunoglobulin superfamily featuring in significant antibody interactions. Researchers often use anti-CD28 antibodies for various immunological assays including CD28 ELISA to study its function.\u003cbr\u003e\nBiological function summary\u003cbr\u003e\nCD28 co-stimulates T cells after antigen presentation. It enhances T cell proliferation survival and cytokine production. CD28 functions alongside the T cell receptor (TCR) complex mediating signals that promote full T cell activation. This interaction amplifies the immune response forming an important axis of immune system communication. CD28 interacts with its ligands B7-1 (CD80) and B7-2 (CD86) found on antigen-presenting cells (APCs) illustrating its role in immune system dynamics.\u003cbr\u003e\nPathways\u003cbr\u003e\nCD28 is integral to the PI3K\/Akt and MAPK\/ERK signaling pathways. These pathways conduct signals critical for cellular growth and survival linking CD28 to downstream transcription factors. The interaction with another protein CTLA-4 acts as a regulatory balance for CD28 signaling preventing over-activation of T cells. This balance influences immune homeostasis and tolerance providing a framework for understanding costimulatory and inhibitory signaling.\u003cbr\u003e\nCD28's role becomes evident in autoimmune diseases and transplant rejection. Abnormal CD28 signaling links to rheumatoid arthritis where inappropriate T cell activation occurs. Similarly CD28 activity contributes to organ transplant rejection by stimulating T cell-mediated responses against transplanted tissues. CTLA-4 through regulatory feedback can modify these effects providing therapeutic target strategies for managing such disorders. Efforts to modulate CD28 activity involve developing therapeutic agents such as anti-CD28 monoclonal antibodies.\u003c\/p\u003e","brand":"Abcam","offers":[{"title":"Default Title","offer_id":46843904721065,"sku":"ab286013","price":0.99,"currency_code":"USD","in_stock":true}],"url":"https:\/\/iright.com\/es\/products\/abcam-ab286013","provider":"Iright","version":"1.0","type":"link"}