Boster's Picokine™ Cystatin B ELISA Kit provide high sensitivity low background quantitative detection of CSTB. It is an all-in-one ready to use kit with all components you need for performing colorimetric ELISA assay. Our 4-hour ELISA protocol saves you the trouble of coating the plate. Our kits are thoroughly validated and documented for inter and intra assay variability.
*ELISA bulk discount: 20% off for 4+ kits, 30% off for 20+ kits, applicable only to USA and Canada.
Cystatin B(CSTB), also called STFB, is a small protein that is a member of the superfamily of cysteine protease inhibitors. It has been isolated from human spleen and liver and its amino acid sequence has been fully determined. The cystatin B gene is located on 21q22.3. It is widely distributed and is localized mostly intracellularly, but has been found extracellularly. The protein is able to form a dimer stabilized by noncovalent forces, inhibiting papain and cathepsins l, h and b. Its role is thought to be as a protector against the proteinases leaking from lysosomes. A cystatin B multiprotein complex might have a specific cerebellar function, and that the loss of this function might contribute to the etiopathogenesis of EPM1. Upon differentiation to myotubes, CSTB becomes excluded from the nucleus and lysosomes, suggesting that the subcellular distribution of CSTB is dependent on the differentiation status of the cell.