S100 Beta Polyclonal antibody

S100 Beta Polyclonal Antibody for WB, IF, FC, IHC, ELISA

Host / Isotype

Rabbit / IgG


human, mouse, rat





Cat no : 15146-1-AP


NEF, Protein S100 B, S 100 protein beta chain, S 100 protein subunit beta, S100, S100 Beta, S100 calcium binding protein B, S100B, S100beta

Tested Applications

Positive WB detected inA375 cells, mouse brain tissue, human testis tissue, human brain tissue, U-251 cells, C6 cells
Positive IHC detected inhuman malignant melanoma tissue, human gliomas tissue, mouse brain tissue, human appendicitis tissue
Note: suggested antigen retrieval with TE buffer pH 9.0; (*) Alternatively, antigen retrieval may be performed with citrate buffer pH 6.0
Positive IF detected inmouse brain tissue, human astrocytes, A375 cells, mouse cerebellum tissue, human malignant melanoma tissue
Positive FC detected inA375 cells

Recommended dilution

Western Blot (WB)WB : 1:500-1:1000
Immunohistochemistry (IHC)IHC : 1:1000-1:6000
Immunofluorescence (IF)IF : 1:50-1:500
Flow Cytometry (FC)FC : 0.50 ug per 10^6 cells in a 100 µl suspension
It is recommended that this reagent should be titrated in each testing system to obtain optimal results.
Sample-dependent, Check data in validation data gallery.

Product Information

15146-1-AP targets S100 Beta in WB, IF, FC, IHC, ELISA applications and shows reactivity with human, mouse, rat samples.

Tested Reactivity human, mouse, rat
Cited Reactivityhuman, mouse, rat
Host / Isotype Rabbit / IgG
Class Polyclonal
Type Antibody
Immunogen S100 Beta fusion protein Ag7440
Full Name S100 calcium binding protein B
Calculated Molecular Weight 11 kDa
Observed Molecular Weight 11 kDa
GenBank Accession NumberBC001766
Gene Symbol S100B
Gene ID (NCBI) 6285
Conjugate Unconjugated
Form Liquid
Purification MethodAntigen affinity purification
Storage Buffer PBS with 0.02% sodium azide and 50% glycerol pH 7.3.
Storage ConditionsStore at -20°C. Stable for one year after shipment. Aliquoting is unnecessary for -20oC storage. 20ul sizes contain 0.1% BSA.

Background Information

S100B belongs to the EF-hand calcium binding proteins and is found primarily in astrocytes in the central nervous system (CNS). S100B has a variety of functions, including calcium homeostasis, cell proliferation, differentiation, migration, and survival, as well as neurite outgrowth and regeneration.

 1. What is the molecular weight of S100B?

S100B protein is composed of non-covalently linked homodimers of 11 kDa size.

2. What is the subcellular localization of S100B?

S100B localizes to the nucleus and cytoplasm, associating with intracellular membranes, the centrosomes, microtubules, and type III intermediate filaments (PMID: 19110011). Additionally, it can be released from astrocytes into the extracellular space and can enter the bloodstream.

3. What is the expression pattern of S100B?

S100B is predominantly expressed in astrocytes and maturing oligodendrocytes but is also present in other cell types such as kidney epithelial cells, neural progenitor cells, pituicytes, ependymocytes, chondrocytes, adipocytes, melanocytes, Langerhans cells, dendritic cells, certain lymphocyte subpopulations, skeletal myofibers, myoblasts, and muscle satellite cells (PMID: 19110011). S100B is a commonly used marker of Schwann cells and reactive astrocytes in ICC, IHC, and WB applications.

4. What is the diagnostic use of S100B in the clinic?

S100B is naturally secreted by astrocytes into the extracellular space and low amounts of S100B can pass through the brain-blood barrier and enter the bloodstream. Elevated levels of S100B in the serum are observed in patients with traumatic head injuries, as well as in patients suffering from neurodegenerative diseases (PMID: 30144068). This increase in S100B levels is attributed to the elevated secretion of S100B protein from astrocytes as part of the physiological response to the injury, as well as to the physical damage of astrocytes and increased blood-brain barrier permeability.


Product Specific Protocols
WB protocol for S100 Beta antibody 15146-1-APDownload protocol
IHC protocol for S100 Beta antibody 15146-1-APDownload protocol
IF protocol for S100 Beta antibody 15146-1-APDownload protocol
Standard Protocols
Click here to view our Standard Protocols




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The reviews below have been submitted by verified Proteintech customers who received an incentive forproviding their feedback.


Clarisse (Verified Customer) (08-08-2022)

This antibody works very well as an astrocyte marker. In the image: in green mouse anti-S100B (1:500 - 66616-1-Ig) and in magenta rabbit anti-S100B (1:500 - 15146-1-AP). The rabbit antibody has a better performance.

  • Applications: Immunofluorescence
  • Primary Antibody Dilution: 1:500
  • Cell Tissue Type: Human cerebral organoids
S100 Beta Antibody Immunofluorescence validation (1:500 dilution) in Human cerebral organoids (Cat no:15146-1-AP)

Tongcheng (Verified Customer) (09-08-2021)

This antibody works perfect on human astrocytes.

  • Applications: Immunofluorescence
  • Primary Antibody Dilution: 1:200
  • Cell Tissue Type: astrocyte

Sonia (Verified Customer) (10-21-2019)

Works really well on mouse sciatic nerve cross section (cryostat)

  • Applications: Immunofluorescence,
  • Primary Antibody Dilution: 1/400
  • Cell Tissue Type: mouse scitic nerve
S100 Beta Antibody Immunofluorescence, validation (1/400 dilution) in mouse scitic nerve (Cat no:15146-1-AP)