Catalogue number
ANT-339
Synonyms
Cystatin-B, Stefin-B, Liver thiol proteinase inhibitor, CPI-B, CSTB, CST6, EPM1, PME, STFB.
Type
Mouse Anti Human Monoclonal.
Introduction
Type 1 cystatins are also called stefins which function as intracellular thiol protease inhibitors. Cystatin-B protein is able to form a dimer stabilized by noncovalent forces, inhibiting papain and cathepsins l, h and b. CSTB protein protects proteases leakage from lysosomes. Mutations in Stefin-B gene cause primary defects in patients with progressive myoclonic epilepsy (EPM1), a degenerative disease of the central nervous system. CSTB is overexpressed & elevated in the serum of HCC patients. Cystatin-B in vivo has a polymeric structure which is sensitive to the redox environment. Cystatin-B inhibits bone resorption by down-regulating intracellular cathepsin K activity despite increased osteoclast survival. Protein and mRNA levels of stefin B are significantly lower in atypical benign meningiomas. Stefins-A & Stefin-B which belong to the type-1 Cystatins, are up-regulated in lung tumours and thus able to counteract harmful tumour-associated proteolytic activity. Human stefin-A & Stef
Clone
P2F1AT.
Immunogen
Anti-human CSTB mAb is derived from hybridization of mouse F0 myeloma cells with spleen cells from BALB/c mice immunized with recombinant human CSTB amino acids 1-98 purified from E. coli.
Ig Subclass
Mouse IgG2b heavy chain and κ light chain.
Purification Method
CSTB antibody was purified from mouse ascitic fluids by protein-G affinity chromatography.
Formulation
1mg/ml containing PBS, pH-7.4, & 0.1% Sodium Azide.
Storage Procedures
For periods up to 1 month store at 4°C, for longer periods of time, store at -20°C.
Prevent freeze thaw cycles.
Stability / Shelf Life
12 months at -20°C. 1 month at 4°C.
Applications
CSTB antibody has been tested by ELISA and Western blot analysis to assure specificity and reactivity. Since application varies, however, each investigation should be titrated by the reagent to obtain optimal results. Recommended dilution range for Western blot analysis is 1:1,000~ 2,000. Recommended starting dilution is 1:1,000.
Safety Data Sheet
Usage
ProSpec's products are furnished for LABORATORY RESEARCH USE ONLY. The product may not be used as drugs, agricultural or pesticidal products, food additives or household chemicals.
