Human DC-SIGN+DC-SIGNR Alexa Fluor® 350-conjugated Antibody

Name: Human DC-SIGN+DC-SIGNR Alexa Fluor® 350-conjugated Antibody
Brand: rnd
SKU: FAB1621U

Catalog # FAB1621U

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Key Product Details

Species Reactivity:	Human
Immunogen:	NIH-3T3 mouse embryonic fibroblast cell line transfected with human DC-SIGNR Accession # Q9H2X3
Applications:	Flow Cytometry
Label:	Alexa Fluor 350
Specificity:	Recognizes both human DC-SIGN and human DC-SIGNR on transfected cells. Does not react with parental mouse cells or irrelevant transfectants.

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Applications

	Recommended Concentration	Sample
Flow Cytometry	0.25-1 µg/10⁶ cells	Human DC-SIGN or DC-SIGNR transfected 3T3 mouse embryonic fibroblast cell line, and human monocyte derived dendritic cells

Please Note: Optimal dilutions should be determined by each laboratory for each application.

Formulation, Preparation and Storage

Formulation	Supplied 0.2 mg/mL in a saline solution containing BSA and Sodium Azide.
Shipping	The product is shipped with polar packs. Upon receipt, store it immediately at the temperature recommended below.
Stability & Storage	Store the unopened product at 2 - 8 °C. Do not use past expiration date.

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Background: DC-SIGN+DC-SIGNR

DC-SIGN (Dendritic Cell- Specific ICAM-3 Grabbing Non-Integrin) has been shown to play an important role in regulating dendritic cell (DC) and T cell interactions, including antigen presentation to T cells and enhancement of transinfection of CD4+ T cells by HIV-1 (1, 2). Efforts to identify additional type II membrane proteins resulted in the isolation of a molecule related in sequence to DC-SIGN known as DC-SIGNR (DC-SIGN Related) (3, 4). DC-SIGNR shares 73 - 80% amino acid homology with DC-SIGN and is located on human chromosome 19p13.3. Its structure is similar to DC-SIGN and therefore binds mannose residues in a calcium dependent fashion, including ICAM-3 and HIV-1 gp120 (5). DC-SIGNR, also known as L-SIGN (Liver/Lymph node-Specific ICAM-3-Grabbing Non-integrin) and DC-SIGNR, is polymorphic since allelic variations of the exon 4 encoded sequence have been isolated (5). This is further supported by a study demonstrating the ability to isolate a large repertoire of DC-SIGNR transcripts largely the result of alternative splicing of the 7 coding exons (6). L-SIGN/DC-SIGNR is primarily transcribed in the liver and lymph nodes but not in monocyte derived DC (5). Expression of L-SIGN/DC-SIGNR is restricted to endothelial cells derived from liver sinusoids, lymph nodes sinuses and capillaries (7) although variable expression in placenta and some monocytic cell lines has also been reported, including both membrane and soluble isoforms of the protein (6). Expression of DC-SIGN is induced during the in-vitro generation of DC from either monocytes or bone marrow progenitors, with maximal surface expression at day 7 of culture (1). Immature DC in the skin and mature DC in the tonsil have been demonstrated to express DC-SIGN (8). Analysis of various tissues and cell lines suggests that DC-SIGN expression is restricted to DC (1) although a more recent report finds evidence of expression in placenta, resting monocytes and monocytic cell lines (6). This discrepancy may be partially related to the multiple isoforms of DC-SIGN transcripts, including both membrane and soluble forms, as well as exon splice variants reported in the latter study (6).

Item	Value
References	Geijtenbeek, T.B.H. et al. (2000) Cell 100:575. Geijtenbeek, T.B.H. et al. (2000) Cell 100:587. Yokoyama-Kobayashi, M.T. et al. (1999) Gene 228:161. Soilleux, E.J. et al. (2000) J. Immunol. 165:2937. Bashirova, A.A. et al. (2001) J. Exp. Med. 193:671. Mummidi, S. et al. (2001) J. Biol. Chem. 276:33196.. Pohlman, S. et al. (2001) Proc. Natl. Acad. Sci. USA 98:2670. Geijtenbeek, T.B.H. et al. (2000) Nature Immunol. 1:353.
Long Name	Dendritic Cell-specific ICAM-3-grabbing Non-integrin
Entrez Gene IDs	30835 (Human)
Alternate Names	DC-SIGN+DC-SIGNR, DCSIGN+DCSIGNR

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Human DC-SIGN+DC-SIGNR Alexa Fluor® 350-conjugated Antibody

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Key Product Details

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Formulation, Preparation and Storage

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Background: DC-SIGN+DC-SIGNR

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