Validated using a knockout cell line

Recombinant Anti-Syntaxin 4 antibody [EPR15473] - BSA and Azide free (ab242403)


  • Product name

    Anti-Syntaxin 4 antibody [EPR15473] - BSA and Azide free
    See all Syntaxin 4 primary antibodies
  • Description

    Rabbit monoclonal [EPR15473] to Syntaxin 4 - BSA and Azide free
  • Host species

  • Tested applications

    Suitable for: WBmore details
  • Species reactivity

    Reacts with: Mouse, Rat, Human
  • Immunogen

    Synthetic peptide within Human Syntaxin 4 aa 100-200. The exact sequence is proprietary.
    Database link: Q12846

  • Positive control

    • WB: HEK-293, K562, HeLa and A431 cell lysates. Wild-type HAP1 cell lysate.
  • General notes

    Ab242403 is the carrier-free version of ab184545. This format is designed for use in antibody labeling, including fluorochromes, metal isotopes, oligonucleotides, enzymes.


    Our carrier-free formats are supplied in a buffer free of BSA, sodium azide and glycerol for higher conjugation efficiency.

    Use our conjugation kits  for antibody conjugates that are ready-to-use in as little as 20 minutes with <1 minute hands-on-time and 100% antibody recovery: available for fluorescent dyes, HRP, biotin and gold.

    ab242403 is compatible with the Maxpar® Antibody Labeling Kit from Fluidigm.

    Maxpar® is a trademark of Fluidigm Canada Inc.

    Our RabMAb® technology is a patented hybridoma-based technology for making rabbit monoclonal antibodies. For details on our patents, please refer to RabMab® patents.

    This product is a recombinant rabbit monoclonal antibody.



Our Abpromise guarantee covers the use of ab242403 in the following tested applications.

The application notes include recommended starting dilutions; optimal dilutions/concentrations should be determined by the end user.

Application Abreviews Notes
WB Use at an assay dependent concentration. Detects a band of approximately 34 kDa (predicted molecular weight: 34 kDa).


  • Function

    Plasma membrane t-SNARE that mediates docking of transport vesicles. Necessary for the translocation of SLC2A4 from intracellular vesicles to the plasma membrane. Together with STXB3 and VAMP2, may also play a role in docking/fusion of intracellular GLUT4-containing vesicles with the cell surface in adipocytes (By similarity). May also play a role in docking of synaptic vesicles at presynaptic active zones.
  • Tissue specificity

    Expressed in neutrophils and neutrophil-differentiated HL-60 cells. Expression in neutrophils increases with differentiation.
  • Sequence similarities

    Belongs to the syntaxin family.
    Contains 1 t-SNARE coiled-coil homology domain.
  • Cellular localization

    Cell membrane.
  • Information by UniProt
  • Database links

  • Alternative names

    • NY REN 31 antigen antibody
    • p35 2 antibody
    • PLACENTAL antibody
    • Renal carcinoma antigen NY REN 31 antibody
    • Renal carcinoma antigen NY-REN-31 antibody
    • Stx4 antibody
    • STX4_HUMAN antibody
    • STX4A antibody
    • Syntaxin 4 antibody
    • syntaxin 4A (placental) antibody
    • Syntaxin 4A antibody
    • Syntaxin-4 antibody
    see all


  • Lane 1: Wild-type HAP1 cell lysate (20 µg)
    Lane 2: Syntaxin 4 knockout HAP1 cell lysate (20 µg)
    Lane 3: K562 cell lysate (20 µg)
    Lane 4: HeLa cell lysate (20 µg)
    Lanes 1 - 4: Merged signal (red and green). Green - ab184545 observed at 1X kDa. Red - loading control, ab18058, observed at 124 kDa.

    ab184545 was shown to recognize Syntaxin 4 when Syntaxin 4 knockout samples were used, along with additional cross-reactive bands. Wild-type and Syntaxin 4 knockout samples were subjected to SDS-PAGE. ab184545 and ab18058 (loading control to Vinculin) were diluted 1/1000 and 1/10,000 respectively and incubated overnight at 4°C. Blots were developed with Goat anti-Rabbit IgG H&L (IRDye® 800CW) preadsorbed ab216773 and Goat anti-Mouse IgG H&L (IRDye® 680RD) preadsorbed ab216776 secondary antibodies at 1/10,000 dilution for 1 hour at room temperature before imaging.

    This data was developed using the same antibody clone in a different buffer formulation containing PBS, BSA, glycerol and sodium azide (ab184545).


ab242403 has not yet been referenced specifically in any publications.

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