Human CD5L Biotinylated Antibody

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Product Details
Citations (1)
Supplemental Products

Human CD5L Biotinylated Antibody Summary

Species Reactivity
Detects human CD5L in Western blots. In Western blots, less than 1% cross-reactivity with recombinant human CD5 and recombinant mouse CD5L is observed.
Polyclonal Goat IgG
Antigen Affinity-purified
Mouse myeloma cell line NS0-derived recombinant human CD5L
Accession # O43866
Lyophilized from a 0.2 μm filtered solution in PBS with BSA as a carrier protein.


Recommended Concentration
Western Blot
0.1 µg/mL
Recombinant Human CD5L (Catalog # 2797-CL)

Please Note: Optimal dilutions should be determined by each laboratory for each application. General Protocols are available in the Technical Information section on our website.

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Preparation and Storage

Reconstitute at 0.2 mg/mL in sterile PBS.
Reconstitution Buffer Available
Reconstitution Buffer 1 (PBS)
Catalog #
Size / Price
The product is shipped at ambient temperature. Upon receipt, store it immediately at the temperature recommended below.
Stability & Storage
Use a manual defrost freezer and avoid repeated freeze-thaw cycles.
  • 12 months from date of receipt, -20 to -70 °C as supplied.
  • 1 month, 2 to 8 °C under sterile conditions after reconstitution.
  • 6 months, -20 to -70 °C under sterile conditions after reconstitution.

Background: CD5L

CD5L (CD5 antigen-like), also known as Sp alpha and AIM, is a 50 kDa secreted glycoprotein that belongs to the SRCR (scavenger receptor cysteine rich) group B family of proteins. Group B proteins are distinguished by SRCR domains that are encoded by a single exon (1‑3). The human CD5L cDNA encodes a 347 amino acid (aa) precursor that includes a 19 aa signal sequence and three SRCR domains (4, 5). Among group B proteins, CD5L is most closely related to CD5 and CD6, with which it shares 18% and 31% aa sequence identity, respectively. CD5L is up-regulated in macrophages at inflammatory sites. It sustains inflammatory reactions by both increasing the phagocytic capacity of macrophages and impeding the apoptosis of local macrophages, NK cells, and T cells (6, 7). Agonists of the LXR and RXR nuclear hormone receptors induce CD5L up‑regulation in macrophages and reduce macrophage apoptosis (8, 9). Oxidized LDL (which acts through LXR/RXR) is taken up by macrophages, promoting their development into foam cells. The increased level of CD5L protects foam cells from apoptosis but permits more rapid cellular accumulation and atherosclerotic plaque formation (9). In activated B cells, however, the combination of CD5L and TGF-beta inhibits proliferation. The binding of CD5L to splenic B cells is increased following TGF-beta exposure, suggesting that TGF-beta increases the expression or availability of an unidentified CD5L receptor (5, 10). CD5L also functions as a pattern recognition molecule by binding both lipoteichoic acid on Gram positive and lipopolysaccharide on Gram negative bacteria (11). In the thymic cortex, CD5L protects cortical CD4+CD8+ thymocytes from apoptosis (12). CD5L circulates in the serum in complex with IgM (13).

  1. Sarrias, M.R. et al. (2004) Crit. Rev. Immunol. 24:1.
  2. Resnick, D. et al. (1994) Trends Biochem. Sci. 19:5.
  3. Mukhopadhyay, S. and S. Gordon (2004) Immunobiology 209:39.
  4. Gebe, J.A. et al. (1997) J. Biol. Chem. 272:6151.
  5. Gebe, J.A. et al. (2000) Immunol. 99:78.
  6. Haruta, I. et al. (2001) J. Biol. Chem. 276:22910.
  7. Kuwata, K. et al. (2003) Am. J. Pathol. 162:837.
  8. Valledor, A.F. et al. (2004) Proc. Natl. Acad. Sci. 101:17813.
  9. Arai, S. et al. (2005) Cell Metab. 1:201.
  10. Yusa, S. et al. (1999) Eur. J. Immunol. 29:1086.
  11. Sarrias, M-R. et al. (2005) J. Biol. Chem. 280:35391.
  12. Miyazaki, T. et al. (1999) J. Exp. Med. 189:413.
  13. Tissot, J.D. et al. (2002) Electrophoresis 23:1203.
Long Name
CD5 Antigen-like
Entrez Gene IDs
922 (Human); 11801 (Mouse)
Alternate Names
AIM; API6; apoptosis inhibitor 6; CD5 antigen-like (scavenger receptor cysteine rich family); CD5 antigen-like; CD5 molecule-like; CD5L; CT-2; IgM-associated peptide; PRO229; Spalpha; SP-alpha

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Citation for Human CD5L Biotinylated Antibody

R&D Systems personnel manually curate a database that contains references using R&D Systems products. The data collected includes not only links to publications in PubMed, but also provides information about sample types, species, and experimental conditions.

1 Citation: Showing 1 - 1

  1. Human scavenger protein AIM increases foam cell formation and CD36-mediated oxLDL uptake.
    Authors: Amezaga N, Sanjurjo L, Julve J, Aran G, Perez-Cabezas B, Bastos-Amador P, Armengol C, Vilella R, Escola-Gil J, Blanco-Vaca F, Borras F, Valledor A, Sarrias M
    J Leukoc Biol, 2013;95(3):509-20.
    Species: Human
    Sample Types: Cell Lysates
    Applications: Western Blot


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