SR-AI/MSR Antibody (351615) [Alexa Fluor® 750]

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Product Details

Summary
Reactivity HuSpecies Glossary
Applications Flow
Clone
351615
Clonality
Monoclonal
Host
Mouse
Conjugate
Alexa Fluor 750
Concentration
Please see the vial label for concentration. If unlisted please contact technical services.

SR-AI/MSR Antibody (351615) [Alexa Fluor® 750] Summary

Immunogen
Mouse myeloma cell line NS0-derived recombinant human SR‑AI/MSR
Lys77-Leu451
Accession # P21757
Specificity
Detects human SR‑AI/MSR in direct ELISAs and Western blots. In direct ELISAs and Western blots, no cross-reactivity with recombinant mouse SR-AI is observed.
Isotype
IgG2b
Clonality
Monoclonal
Host
Mouse
Gene
MSR1
Innovator's Reward
Test in a species/application not listed above to receive a full credit towards a future purchase.

Applications/Dilutions

Dilutions
  • Flow Cytometry 0.25-1 ug/10^6 cells
Application Notes
Flow Cytometry: Please use 0.25-1 ug of conjugated antibody per 10e6 cells.

Packaging, Storage & Formulations

Storage
Store the unopened product at 2 - 8 °C. Do not use past expiration date.
Buffer
Supplied 0.2 mg/mL in a saline solution containing BSA and Sodium Azide.
Preservative
0.09% Sodium Azide
Concentration
Please see the vial label for concentration. If unlisted please contact technical services.

Notes

This product is produced by and ships from R&D Systems, Inc., a Bio-Techne brand.

Alternate Names for SR-AI/MSR Antibody (351615) [Alexa Fluor® 750]

  • CD204 antigen
  • CD204
  • Macrophage acetylated LDL receptor I and II
  • macrophage scavenger receptor 1
  • macrophage scavenger receptor type III
  • MSR1
  • phSR1
  • phSR2
  • SCARA1
  • SCARA1macrophage scavenger receptor types I and II
  • Scavenger receptor class A member 1
  • scavenger receptor class A, member 1
  • SR-A
  • SRAI
  • SR-AI

Background

The type I class A macrophage scavenger receptor (SR-AI; also MSR-AI) is a 70-80 kDa protein that belongs to the scavenger receptor superfamily (1‑3). Receptors of this family contain characteristic extracellular domains and bind to a series of generally unrelated, but negatively-charged/polyanionic ligands (1, 3). Human SR-AI is a type II transmembrane glycoprotein that is 451 amino acids (aa) in length. It contains a 50 aa cytoplasmic tail, a 26 aa transmembrane segment and a 375 aa extracellular region (4, 5). The extracellular region contains four definitive domains, with a membrane proximal spacer of 33 aa, an alpha -helical coiled-coil domain of 163 aa, a collagen-like domain of 69 aa, and a cysteine-rich C-terminus of 110 aa (4, 6). The cysteine-rich domain (CRD) forms three intrachain disulfide bonds (7). The functional form of the molecule is a 220‑230 kDa membrane-associated trimer that, in human, apparently has two disulfide bonded chains and a third noncovalently associated subunit (8, 9). Human extracellular region is 73% and 72% aa identical to bovine and mouse SR-AI extracellular region, respectively. The human gene for SR-A gives rise to three isoforms; the I isoform of 451 aa, the II isoform of 358 aa, and the III isoform of 388 aa (4, 5, 10). All are identical through the first 344 aa which includes the cytoplasmic tail through the collagenous domain. Isoform II (SR-AII) shows a severe truncation of the CRD, but is expressed on the cell surface. Isoform III (SR-AIII) has a modest truncation of the CRD, and cannot be expressed on the cell surface. However, relative to SR-AI, SR-AII is known to show differential sensitivity to LPS and receptor binding to gram‑negative bacteria (9, 11), while SR-AIII is known to be a dominant-negative isoform (10). SR-AIII may achieve this by either heterotrimerizing with SR-AI, or simply eliminating the production of SR-AI mRNA.

  1. Platt, N. and S. Gordon (2001) J. Clin. Invest. 108:649.
  2. Linton, M.F. and S. Fazio (2001) Curr. Opin. Lipidol. 12:489.
  3. Platt, N. and S. Gordon (1998) Chem. Biol. 5:R193.
  4. Matsumoto, A. et al. (1990) Proc. Natl. Acad. Sci. USA 87:9133.
  5. Emi, M. et al. (1993) J. Biol. Chem. 268:2120.
  6. Naito, M. et al. (1992) Am. J. Pathol. 141:591.
  7. Resnick, D. et al. (1996) J. Biol. Chem. 271:26924.
  8. Ashkenas, J. et al. (1993) J. Lipid Res. 34:983.
  9. Penman, M. et al. (1991) J. Biol. Chem. 266:23985.
  10. Gough, P.J. et al. (1998) J. Lipid Res. 39:531.
  11. Peiser, L. et al. (2000) Inf. Immun. 68:1953.

Limitations

This product is for research use only and is not approved for use in humans or in clinical diagnosis. Primary Antibodies are guaranteed for 1 year from date of receipt.

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Secondary Antibodies

 

Isotype Controls

Other Available Formats

Alexa Fluor 350 FAB2708U
Alexa Fluor 405 FAB2708V
Alexa Fluor 488 FAB2708G
Alexa Fluor 594 FAB2708T
Alexa Fluor 647 FAB2708R
Alexa Fluor 700 FAB2708N
Alexa Fluor 750 FAB2708S
Allophycocyanin FAB2708A
Phycoerythrin FAB2708P

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Bioinformatics

Gene Symbol MSR1
Uniprot