• USA Home
  • MAB5258-I - Anti-Synaptophysin Antibody, clone SY38

MAB5258-I Sigma-Aldrich

Anti-Synaptophysin Antibody, clone SY38

clone SY38, from mouse

Synonym: Synaptophysin, Major synaptic vesicle protein p38

  •  eCl@ss 32160702



Related Categories Alphabetical Index, Antibodies, Primary Antibodies, SU-SY
clone   SY38, monoclonal
biological source   mouse
application(s)   immunocytochemistry: suitable
  immunofluorescence: suitable
  immunohistochemistry: suitable (paraffin)
  western blot: suitable
species reactivity   bovine, mouse, rat, mouse, bovine, human, human, rat
shipped in   ambient
isotype   IgG1κ
Quality Level   100
antibody product type   primary antibodies
NCBI accession no.   NP_776388
UniProt accession no.   P20488
Gene Information   human ... SYP(6855)


General description

Synaptophysin (UniProt P20488; also known as Major synaptic vesicle protein p38) is encoded by the SYP gene (Gene ID 280937) in bovine species. Synaptophysin is a 38 kDa four-transmembrane glycoprotein on synaptic vesicle (SV) with both its N- and C-termini exposed cytoplasmically. Synaptophysin forms homomultimers in the SV membrane and is heavily phosphorylated on tyrosine residues in its C-terminal pentapeptide repeats. Synapthophysin is also known to interact with SV v-SNARE protein synaptobrevin II (sybII) when sybII is not engaged with other SNARE proteins, suggesting a role of synaptophysin in sybII retrieval during SV endocytosis. Consistently, synaptophysin-knockout neurons display reduced level of sybII at their nerve terminals.


Clone SY38 detects synaptophysin and stains synaptophysin-containing vesicles by targeting the flexible segment -SGGGG- in the center of the C-termimal pentapeptide repeats (Knaus, P., and Betz, H. (1990). FEBS Lett. 261(2):358-360).


Presynaptic vesicles from bovine brain (Wiedenmann, B., and Franke, W.W. (1985). Cell. 41(3):1017-1028).


Anti-Synaptophysin, clone SY38, Cat. No. MAB5258-I, is a highly specific mouse monoclonal antibody that targets Synaptophysin and has been tested in Immunocytochemistry, Immunofluorescence, Immunohistochemistry, and Western Blotting.

Immunohistochemistry Analysis: A 1:50 dilution from a representative lot detected Synaptophysin in human cerebellum and cerebral cortex tissue sections.

Western Blotting Analysis: A 1:1,000 dilution from a representative lot detected Synaptophysin in 10 µg of rat hippocampus and human whole brain tissue lysates.

Immunocytochemistry Analysis: Representative lots immunostained presynaptic vesicles of 4% formaldehyde-fxied, 0.2% Triton X-100-permeabilzied primary mouse hippocampal neurons by fluorescent immunocytochemistry (Hu, X., et al. (2008). J. Neurosci. 28(49):13094-13105; Tarr, P.T., and Edwards, P.A. (2008). J. Lipid Res. 49(1):169-182).

Immunofluorescence Analysis: A representative lot immunostained presynaptic membrane of neurons by fluorescent immunohistochemistry staining of 4% paraformaldehyde-fixed, 0.3% Triton X-100-permeabilized, OCT-embedded rat spinal cord cryosections (Stück, E.D., et al. (2012). Neural Plast. 2012:261345).

Immunofluorescence Analysis: A representative lot immunostained synaptophysin around a large neuron in the ventral horn of the lumbar (L3/L4) segment by fluorescent immunohistochemistry staining of 2% paraformaldehyde/0.2% parabenzoquinone-fixed free-floating rat spinal cord sections (Macias, M., et al. (2009). BMC Neurosci. 10:144).

Immunofluorescence Analysis: A representative lot immunostained synaptophysin in bovine (pancreas) and human (pancreas, pheochromocytoma, and islet-cell carcinoma) frozen tissue sections (Wiedenmann, B., et al. (1986). Proc. Natl. Acad. Sci. U.S.A. 83(10):3500-3504).

Western Blotting Analysis: A representative lot detected an upregulated synaptophysin expression in human iPSCs with a 4-bp deletion in DISC1 gene (Wen, Z., et al. (2014). Nature. 515(7527):414-418).

Western Blotting Analysis: A representative lot detected synaptophysin distribution among PC12 rat pheochromocytoma cell membrane fractions (Salazar, G., et al. (2005). Mol. Biol. Cell. 16(8):3692-3704).

Western Blotting Analysis: A representative lot detected only synaptophysin recombinant contructs that contained the flexible segment -SGGGG- in the center of the c-terminal pentapeptide repeats (Knaus, P., and Betz, H. (1990). FEBS Lett. 261(2):358-360).

Research Category

Target description

~38 kDa observed. 33.91/34.03/33.31 kDa (bovine/mouse/rat), 33.85/20.76 kDa (human isoform 1/2) calculated. Uncharacterized bands may be observed in some lysate(s).

Physical form

Format: Purified

Protein G purified.

Purified mouse IgG1κ in buffer containing 0.1 M Tris-Glycine (pH 7.4), 150 mM NaCl with 0.05% sodium azide.

Storage and Stability

Stable for 1 year at 2-8°C from date of receipt.


Unless otherwise stated in our catalog or other company documentation accompanying the product(s), our products are intended for research use only and are not to be used for any other purpose, which includes but is not limited to, unauthorized commercial uses, in vitro diagnostic uses, ex vivo or in vivo therapeutic uses or any type of consumption or application to humans or animals.


Evaluated by Western Blotting in mouse hypothalamus tissue lysate.

Western Blotting Analysis: A 1:1,000 dilution of this antibody detected Synaptophysin in 10 µg of mouse hypothalamus tissue lysate.

Other Notes

Concentration: Please refer to lot specific datasheet.

Safety & Documentation

Safety Information

Safety Information for this product is unavailable at this time.
Protocols & Articles


Antibody Basics

Immunoglobulins (Igs) are produced by B lymphocytes and secreted into plasma. The Ig molecule in monomeric form is a glycoprotein with a molecular weight of approximately 150 kDa that is shaped more ...
Keywords: Affinity chromatography, Centrifugation, Chromatography, Digestions, Direct immunofluorescence, Gene expression, High performance liquid chromatography, Immunofluorescence, Ion Exchange, Microscopy, Precipitation, Purification, Rheumatology, Scanning electron microscopy


Western Blot Protocol | Immunoblotting Protocol

Western Blotting refers to the electrophoretic transfer of proteins from sodium dodecyl sulfate polyacrylamide gels to sheets of PVDF or nitrocellullose membrane, followed by immunodetection of prote...
Keywords: AGE, Buffers, Cell disruption, Detection methods, Detergents, Dialysis, Electroblotting, Electrophoresis, Enzyme activity, Gel electrophoresis, Immunoprecipitation, PAGE, Protein extraction, Purification, Sample preparations, Western blot

Related Content

Antibody Explorer | Buy Primary Antibodies & Secondary Antibodies

Primary, Secondary and Recombinant Monoclonal Antibodies Providing highly cited primary and secondary antibodies, we have you covered for your ELISA, western blot, immunohistochemistry or other assay...
Keywords: Alzheimer Disease, Cancer, Chromatin immunoprecipitation, Diagnostic, Enzyme-linked immunosorbent assay, Flow cytometry, Immunocytochemistry, Immunofluorescence, Immunohistochemistry, Neuroscience, Western blot

Related Products

Technical Service:

Our team of scientists has experience in all areas of research including Life Science, Material Science, Chemical Synthesis, Chromatography, Analytical and many others.

Bulk Ordering & Pricing:

Need larger quantities for your development, manufacturing or research applications?