Recombinant Stathmin 1 / STMN1 [STMN1/8001R]



Op18 (for oncoprotein 18, also designated stathmin, prosolin or metablastin) is a conserved, Tubulin-associated, intracellular phosphoprotein. Many different phosphorylated forms of Op18 are observed, and it is expressed as two different isoforms. Op18 is considered a critical regulator of microtubulin dynamics and is downregulated by p53. It serves as a transducing protein, via phophorylation, for a variety of cell signaling pathways and is involved in both mitosis and differentiation. Op18 is present in many cancers, including breast carcinomas, and is highly expressed in acute leukemias of different subtypes.

Product Properties & Targets

Species Reactivity
Cellular Localization
Cytoplasm. Cytoskeleton.
Gene Name
Positive Control
Human brain or melanoma tissue.
Recombinant fragment of human STMN1 protein (exact sequence is proprietary)
Alternate Names
Stathmin, Leukemia-associated phosphoprotein p18, Metablastin, Oncoprotein 18, Phosphoprotein p19, Prosolin, Protein Pr22, pp17, C1orf215; Lag; LAP18; Leukemia associated phosphoprotein p18; Metablastin; Oncoprotein 18; Op18; Phosphoprotein 19; Phosphoprotein p19; pp17; pp19; Pr22 protein; Prosolin; Protein Pr22; SMN; Stathmin1; STMN 1

Database Links

Entrez Gene ID

Additional Information

Human Gene Symbol
Chromosome Location
Mol. Weight of Antigen


  • Involved in the regulation of the microtubule (MT) filament system by destabilizing microtubules. Prevents assembly and promotes disassembly of microtubules. Phosphorylation at Ser-16 may be required for axon formation during neurogenesis. Involved in the control of the learned and innate fear (By similarity).

Known Applications & Suggested Dilutions

  • Immunohistochemistry (Formalin-fixed) (1-2ug/ml for 30 minutes at RT),(Staining of formalin-fixed tissues requires heating tissue sections in 10mM Tris with 1mM EDTA, pH 9.0, for 45 min at 95&degC followed by cooling at RT for 20 minutes),Optimal dilution for a specific application should be determined.

Key References

  • Cai Y,et al. Cell Death Dis, 2022 Feb 24. PMID 35210426

Storage & Stability

Antibody with azide - store at 2 to 8°C. Antibody without azide - store at -20 to -80°C. Antibody is stable for 24 months. Non-hazardous. No MSDS required.


This antibody is available for research use only and is not approved for use in diagnosis.

Supplied as

200ug/ml of Ab purified from Bioreactor Concentrate by Protein A/G. Prepared in 10mM PBS with 0.05% BSA & 0.05% azide. Also available WITHOUT BSA & azide at 1.0mg/ml.


There are no warranties, expressed or implied, which extend beyond this description. Company is not liable for any personal injury or economic loss resulting from this product.


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