Human SALM3/LRFN4 Antibody

Catalog # Availability Size / Price Qty
SALM3/LRFN4 in Human Brain.
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Product Details
Citations (1)
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Human SALM3/LRFN4 Antibody Summary

Species Reactivity
Detects human SALM3/LRFN4 in direct ELISAs. In direct ELISAs, 100% cross-reactivity with recombinant human (rh) SALM1, approximately 20-25% cross-reactivity with recombinant human rhSALM2, and no cross-reactivity with rhSALM4 is observed.
Monoclonal Mouse IgG1 Clone # 578102
Protein A or G purified from hybridoma culture supernatant
Chinese hamster ovary cell line CHO-derived recombinant human SALM3/LRFN4
Accession # Q6PJG9
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
8-25 µg/mL
See below

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.

Scientific Data

Immunohistochemistry SALM3/LRFN4 antibody in Human Brain by Immunohistochemistry (IHC-P). View Larger

SALM3/LRFN4 in Human Brain. SALM3/LRFN4 was detected in immersion fixed paraffin-embedded sections of human brain (cerebellum) using Mouse Anti-Human SALM3/LRFN4 Monoclonal Antibody (Catalog # MAB5445) at 15 µg/mL overnight at 4 °C. Before incubation with the primary antibody, tissue was subjected to heat-induced epitope retrieval using Antigen Retrieval Reagent-Basic (Catalog # CTS013). Tissue was stained using the Anti-Mouse HRP-DAB Cell & Tissue Staining Kit (brown; Catalog # CTS002) and counterstained with hematoxylin (blue). View our protocol for Chromogenic IHC Staining of Paraffin-embedded Tissue Sections.

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Preparation and Storage

Sterile PBS to a final concentration of 0.5 mg/mL.
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. *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: SALM3/LRFN4

Synaptic adhesion-like molecule 3 (SALM3; also leucine-rich repeat and fibronectin type-III domain-containing protein 4 (LRFN4) is an approximately 90 kDa member of the Lrfn family of type I transmembrane glycoproteins (1).  Human SALM3 is synthesized as a 635 amino acid (aa) precursor that contains a 16 aa signal sequence, a 502 aa extracellular domain (ECD), a 21 aa transmembrane region, and a 96 aa cytoplasmic region.  The ECD consists of seven leucine-rich repeats (LRR), an IgC2-like domain, and a fibronectin type-III domain, tandemly aligned in that order (1 - 2).  In addition, there are six potential sites for N-linked glycosylation.  The C-terminal region contains an intracellular PDZ binding domain, which is conserved among SALMs 1 - 3, but is absent in SALMs 4 and 5 (3). Mature human SALM3 shares 97% aa sequence identity with mature mouse SALM3.  Northern blot analysis showed that in mice, SALM3 is strongly expressed in the adult brain and is also present in the adult testis (1). It is distributed throughout the neuron, including the growth cone (3).  In the developing mouse embryo, a temporal expression profile blot revealed a general increment of expression around E10.5, with weak expression detected before E10.5 (1). SALM3, like the other SALMs, promotes neurite outgrowth (3).  Specifically, the SALMs modify total outgrowth and neurite branching (3).  SALM3 may also be involved in synapse formation, synaptic maintenance, and other cellular interactions (3).

  1. Morimura, N. et al. (2006) Gene 380:72.
  2. Wang, C.Y. et al. (2006) J. Neurosci. 26:2174.
  3. Wang, P.Y. et al. (2008) Mol. Cell. Neurosci. 39:83.
Long Name
Synaptic Adhesion-like Molecule 3/Leucine-rich Repeat and Fibronectin Type III Domain Containing 4
Entrez Gene IDs
78999 (Human); 225875 (Mouse); 688721 (Rat)
Alternate Names

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Citation for Human SALM3/LRFN4 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. High SALM3 Expression in Tumor Cells and Fibroblasts Is Correlated with Poor Prognosis in Gastric Cancer Patients
    Authors: Y Liu, X Chen, X Chen, X Yang, Q Song, H Wu
    Dis. Markers, 2019;2019(0):8282414.
    Species: Human
    Sample Types: Whole Tissue
    Applications: IHC-P


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