Date published: 2026-5-11

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LL-37 Antibody (D-5): sc-166770

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Datasheets
  • LL-37 Antibody (D-5) is a mouse monoclonal IgG1 κ LL-37 antibody, cited in 31 publications, provided at 200 µg/ml
  • raised against amino acids 131-170 mapping at the C-terminus of LL-37 proteolytic fragment of CAP-18 of human origin
  • LL-37 Antibody (D-5) is recommended for detection of mature LL-37 of human origin by WB, IP, IF, IHC(P) and ELISA
  • Anti-LL-37 Antibody (D-5) is available conjugated to agarose for IP; HRP for WB, IHC(P) and ELISA; and to either phycoerythrin or FITC for IF, IHC(P) and FCM
  • also available conjugated to Alexa Fluor® 488, Alexa Fluor® 546, Alexa Fluor® 594 or Alexa Fluor® 647 for WB (RGB), IF, IHC(P) and FCM, and for use with RGB fluorescent imaging systems, such as iBright™ FL1000, FluorChem™, Typhoon, Azure and other comparable systems
  • also available conjugated to Alexa Fluor® 680 or Alexa Fluor® 790 for WB (NIR), IF and FCM; for use with Near-Infrared (NIR) detection systems, such as LI-COR®Odyssey®, iBright™ FL1000, FluorChem™, Typhoon, Azure and other comparable systems
  • m-IgG Fc BP-HRP and m-IgG1 BP-HRP are the preferred secondary detection reagents for LL-37 Antibody (D-5) for WB and IHC(P) applications. These reagents are now offered in bundles with LL-37 Antibody (D-5) (see ordering information below).
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LL-37 Antibody (D-5) is a mouse monoclonal IgG1 kappa light chain antibody that detects the LL-37 protein of human origin by western blotting (WB), immunoprecipitation (IP), immunofluorescence (IF), immunohistochemistry with paraffin-embedded sections (IHCP), and enzyme-linked immunosorbent assay (ELISA). Anti-LL-37 antibody (D-5) is available in both non-conjugated and various conjugated forms, including agarose, horseradish peroxidase (HRP), phycoerythrin (PE), fluorescein isothiocyanate (FITC), and multiple Alexa Fluor® conjugates. LL-37, a member of the cathelicidin family, plays a crucial role in the innate immune response, acting as an antimicrobial peptide that helps prevent infections by directly disrupting microbial membranes. A unique structure, characterized by an amphipathic α-helical conformation, allows LL-37 to interact effectively with bacterial lipopolysaccharides, enhancing the ability to recruit immune cells such as mast cells to sites of inflammation. This recruitment is vital for initiating a robust immune response, particularly in inflammatory skin conditions like psoriasis and dermatitis, where LL-37 levels are significantly elevated. LL-37 is primarily expressed in bone marrow, testis, and neutrophils, and an absence in normal skin epidermis highlights a role in pathological conditions. Additionally, the mouse and rat ortholog, CRAMP (cathelin-related antimicrobial peptide), shares similar antimicrobial properties and is expressed in various tissues, including the testis and intestine, further underscoring the importance of cathelicidins in host defense mechanisms.

For Research Use Only. Not Intended for Diagnostic or Therapeutic Use.

Alexa Fluor® is a trademark of Molecular Probes Inc., OR., USA

LI-COR® and Odyssey® are registered trademarks of LI-COR Biosciences

LL-37 Antibody (D-5) References:

  1. Human cathelicidin, hCAP-18, is processed to the antimicrobial peptide LL-37 by extracellular cleavage with proteinase 3.  |  Sørensen, OE., et al. 2001. Blood. 97: 3951-9. PMID: 11389039
  2. A cathelicidin family of human antibacterial peptide LL-37 induces mast cell chemotaxis.  |  Niyonsaba, F., et al. 2002. Immunology. 106: 20-6. PMID: 11972628
  3. Cathelicidin antimicrobial peptides are expressed in salivary glands and saliva.  |  Murakami, M., et al. 2002. J Dent Res. 81: 845-50. PMID: 12454100
  4. Neonatal skin in mice and humans expresses increased levels of antimicrobial peptides: innate immunity during development of the adaptive response.  |  Dorschner, RA., et al. 2003. Pediatr Res. 53: 566-72. PMID: 12612195
  5. Phylogeny, processing and expression of the rat cathelicidin rCRAMP: a model for innate antimicrobial peptides.  |  Termén, S., et al. 2003. Cell Mol Life Sci. 60: 536-49. PMID: 12737313
  6. The cathelicidins--structure, function and evolution.  |  Tomasinsig, L. and Zanetti, M. 2005. Curr Protein Pept Sci. 6: 23-34. PMID: 15638766
  7. LL-37 transports immunoreactive cGAMP to activate STING signaling and enhance interferon-mediated host antiviral immunity.  |  Wei, X., et al. 2022. Cell Rep. 39: 110880. PMID: 35649354
  8. LL-37, a Multi-Faceted Amphipathic Peptide Involved in NETosis.  |  Radic, M. and Muller, S. 2022. Cells. 11: PMID: 35954305
  9. Regulation of LL-37 in Bone and Periodontium Regeneration.  |  Chinipardaz, Z., et al. 2022. Life (Basel). 12: PMID: 36294968
  10. A novel murine cathelin-like protein expressed in bone marrow.  |  Popsueva, AE., et al. 1996. FEBS Lett. 391: 5-8. PMID: 8706928
  11. Identification of CRAMP, a cathelin-related antimicrobial peptide expressed in the embryonic and adult mouse.  |  Gallo, RL., et al. 1997. J Biol Chem. 272: 13088-93. PMID: 9148921
  12. The expression of the gene coding for the antibacterial peptide LL-37 is induced in human keratinocytes during inflammatory disorders.  |  Frohm, M., et al. 1997. J Biol Chem. 272: 15258-63. PMID: 9182550

Ordering Information

Product NameCatalog #UNITPriceQtyFAVORITES

LL-37 Antibody (D-5)

sc-166770
200 µg/ml
$322.00

LL-37 Antibody (D-5): m-IgG Fc BP-HRP Bundle

sc-527185
200 µg Ab; 10 µg BP
$361.00

LL-37 Antibody (D-5): m-IgG1 BP-HRP Bundle

sc-532558
200 µg Ab; 20 µg BP
$361.00

LL-37 Antibody (D-5) AC

sc-166770 AC
500 µg/ml, 25% agarose
$424.00

LL-37 Antibody (D-5) HRP

sc-166770 HRP
200 µg/ml
$322.00

LL-37 Antibody (D-5) FITC

sc-166770 FITC
200 µg/ml
$336.00

LL-37 Antibody (D-5) PE

sc-166770 PE
200 µg/ml
$349.00

LL-37 Antibody (D-5) Alexa Fluor® 488

sc-166770 AF488
200 µg/ml
$364.00

LL-37 Antibody (D-5) Alexa Fluor® 546

sc-166770 AF546
200 µg/ml
$364.00

LL-37 Antibody (D-5) Alexa Fluor® 594

sc-166770 AF594
200 µg/ml
$364.00

LL-37 Antibody (D-5) Alexa Fluor® 647

sc-166770 AF647
200 µg/ml
$364.00

LL-37 Antibody (D-5) Alexa Fluor® 680

sc-166770 AF680
200 µg/ml
$364.00

LL-37 Antibody (D-5) Alexa Fluor® 790

sc-166770 AF790
200 µg/ml
$364.00

Hi, Does the LL-37 (D-5) antibody (sc-166770) recognize truncated LL-37 fragments that retain only part of the reported epitope (aa 131–170 of hCAP18)? If so, what is the minimal epitope required for reliable antibody binding?

Asked by: Lenka
Thank you for your question. LL-37 (D-5), sc-166770, was raised against amino acids 131–170 of the human hCAP18 protein, corresponding to the C-terminal region of the LL-37 proteolytic fragment. As a monoclonal antibody, it is expected to recognize a linear epitope within this region; however, the exact minimal epitope required for binding has not been epitope-mapped. There are several truncated antimicrobial peptides derived from hCAP18 (such as KR-20, LL-23, LL-29, KS-30, RK-31, and FF-33) retain partial overlap with the 131–170 region, the antibody may recognize some of these fragments if the relevant epitope is preserved. That said, recognition of any specific truncated peptide cannot be guaranteed, as binding depends on whether the core epitope sequence and its local context are retained.
Answered by: BlakeJ
Date published: 2026-01-30

We are using this Ab (LL-37 (D-5): sc-166770) along with m-IgGk-BP-HRP (2ndry Ab as recommended) to analyze protein expression in cancer cell lines (positive control HeLa cells), but having difficulty to see any signal. Any suggestions? thanks

Asked by: SeemaD
Thank you for your question. We recommend using this primary antibody at a starting dilution of 1:200 and loading 40-60 µg of protein. A link to our complete recommended protocol for Western blot is provided below. LL-37 is a short secreted peptide (~4.5 kDa) that is difficult to detect in Western blot. We have not tested this antibody in HeLa cells, so we do not know how abundant LL-37 is in this cell line. We are aware of publications citing use of this antibody in Western blot and we would recommend reviewing these references for more detailed information about using the antibody (e.g., PMID: 25330301 & 23940207). Please contact our Technical Service Department for additional support. Please call us toll-free at (800) 457-3801 option 2, email scbt@scbt.com, or use our live chat. https://www.scbt.com/scbt/resources/protocols/western-immuno-blotting
Answered by: Technical Support
Date published: 2017-02-14

Can this mouse primary antibody be used for IF or IHC staining in mouse tissue?

Asked by: Anna99
Yes. LL-37 Antibody (D-5): sc-166770, is available conjugated to HRP (sc-166770 HRP), 200 µg/ml, for WB, IHC(P) and ELISA; phycoerythrin (sc-166770 PE), fluorescein (sc-166770 FITC), Alexa Fluor® 488 (sc-166770 AF488) or Alexa Fluor® 647 (sc-166770 AF647), 200 µg/ml, for IF, IHC(P) and FCM.
Answered by: Technical Support 13
Date published: 2017-01-09
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Rated 5 out of 5 by from LL-37 antibody - the only one that workedWe brought LL-37 antibodies from other companies to detected LL-37 in bronchial epithelial cells and this monoclonal from Santa Cruz (D-5) was the only one that worked for Western blot analysis
Date published: 2017-12-01
Rated 5 out of 5 by from goodwe applicate it into the ICC of HGECs and it works well
Date published: 2017-02-25
Rated 5 out of 5 by from Outstanding WB and IHCVery clear western blot results; strong signal; also great IHC data
Date published: 2017-01-27
Rated 5 out of 5 by from Versatile AntibodyThis antibody is well-cited for a variety of applications including WB, IP, IF, and even IHC and ELISA. Strong, clear signal with little to no background. Beautiful tissue staining.
Date published: 2017-01-12
Rated 5 out of 5 by from WB publishable data with human carcinomaWB publishable data with human carcinoma - SCBT Publication Review
Date published: 2015-04-26
Rated 5 out of 5 by from Strong band in western blot analysis of humanStrong band in western blot analysis of human recombinant CAMP. -SCBT QC
Date published: 2015-02-08
Rated 5 out of 5 by from Produced superb immunoperoxidase cytoplasmicProduced superb immunoperoxidase cytoplasmic and membrane staining in formalin fixed, paraffin-embedded human spleen tissue. -SCBT QC
Date published: 2014-11-03
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LL-37 Antibody (D-5) is rated 5.0 out of 5 by 7.
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