Human CLC Antibody

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Human CLC Antibody Summary

Species Reactivity
Detects human CLC in direct ELISAs and Western blots. In direct ELISAs, less than 1% cross-reactivity with recombinant human CT-1 is observed.
Polyclonal Goat IgG
Antigen Affinity-purified
E. coli-derived recombinant human CLC
Accession # Q9UBD9
Lyophilized from a 0.2 μm filtered solution in PBS with Trehalose. *Small pack size (SP) is supplied either lyophilized or as a 0.2 µm filtered solution in PBS.


Recommended Concentration
Western Blot
0.1 µg/mL
Recombinant Human CLC (Catalog # 962-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.
The product is shipped at ambient temperature. Upon receipt, store it immediately at the temperature recommended below. *Small pack size (SP) is shipped with polar packs. Upon receipt, store it immediately at -20 to -70 °C
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: CLC

Cardiotrophin-like cytokine (CLC) (also known as novel neurotrophin-1 (NNT-1) and B cell stimulating factor (BSF-3)) is a recently discovered 22-25 kDa member of the IL-6 family of cytokines (1, 2, 3). As such, it is expressed as a long type I cytokine with four alpha -helices in it structure (2). Human CLC is synthesized as a 225 amino acid precursor that contains a 27 aa signal sequence and a 198 aa mature region. It contains one potential N-linked glycosylation site that is apparently utilized, and two distinct binding sites for CNTFR alpha and CLF (4, 5). Although CLC has a signal sequence, it is not secreted unless noncovalently dimerized to either CLF or soluble CNTFR alpha (5, 6). Once dimerized, CLC signals through a tripartite receptor complex composed of gp130, LIFR beta and CNTFR alpha (membrane-bound) (5, 7). Within the IL-6 family, human CLC is most homologous to cardiotrophin-1, sharing approximately 29% amino acid sequence identity (8).  Human to mouse, mature CLC is 96% aa identical. CLC is a trophic factor for motor neurons, a stimulator of ACTH release from corticotrophs, and an inducer of IgE synthesis and B cell proliferation (9, 10, 11). Cells known to express CLC include embryonic muscle, lung epithelium, and mesenchyme in various regions (12).

  1. Murakami, M. et al. (2004) Growth Factors 22:75.
  2. Ernst, M. & B.J. Jenkins (2004) Trends Genet. 20:23.
  3. Senaldi, G. et al. (1999) Proc.Natl. Acad. Sci. USA 96:11458.
  4. Perret, D. et al. (2003) J. Biol. Chem. 279:43961.
  5. Plun-Favreau, H. et al. (2001) EMBO J. 20:1692.
  6. Elson, G.C.A. et al. (2000) Nat. Neurosci. 3:867.
  7. Lelievre, E. et al. (2001) J. Biol. Chem. 276:22476.
  8. Derouet, D. et al. (2004) Proc. Natl. Acad. Sci. USA 101:4827.
  9. Forger, N.G. et al. (2003) J. Neurosci. 23:8854.
  10. Auernhammer, C.J. et al. (2003) Endocrinology 144:1202.
  11. Senaldi, G. et al. (2002) J. Immunol. 168:5690.
  12. de Bovis, B. et al. (2005) Cell Commun. Signal. 3:1.
Long Name
Cardiotrophin-like Cytokine
Entrez Gene IDs
23529 (Human); 56708 (Mouse); 365395 (Rat)
Alternate Names
B-cell stimulating factor 3; B-cell stimulatory factor 3; BSF-3; BSF3BSF-3; cardiotrophin-like cytokine factor 1; CISS2; CLC; CLCF1; CLCNNT-1; CRLF1 associated cytokine-like factor 1; neurotrophin-1/B-cell stimulating factor-3; NNT-1; NNT1B-cell-stimulating factor 3; Novel neurotrophin-1; NR6

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