|Detection of Human and Rat Cystatin B by Western Blot. Western blot shows lysates of human colon tissue, PC‑12 rat adrenal pheochromocytoma cell line, A549 human lung carcinoma cell line, and SK‑BR‑3 human breast cancer cell line. PVDF membrane was probed with 1 µg/mL of Goat Anti-Human/Rat Cystatin B Antigen Affinity-purified Polyclonal Antibody (Catalog # AF1408) followed by HRP-conjugated Anti-Goat IgG Secondary Antibody (Catalog # HAF019). A specific band was detected for Cystatin B at approximately 11 kDa (as indicated). This experiment was conducted under reducing conditions and using Immunoblot Buffer Group 1.|
Detection of Human Cystatin B by Simple WesternTM. Simple Western lane view shows lysates of A549 human lung carcinoma cell line, loaded at 0.2 mg/mL. A specific band was detected for Cystatin B at approximately 18 kDa (as indicated) using 10 µg/mL of Goat Anti-Human/Rat Cystatin B Antigen Affinity-purified Polyclonal Antibody (Catalog # AF1408) followed by 1:50 dilution of HRP-conjugated Anti-Goat IgG Secondary Antibody (Catalog # HAF109). This experiment was conducted under reducing conditions and using the|
12-230 kDa separation system.
Cystatin B, also called stefin B or liver thiol proteinase inhibitor, is a member of family 1 of the cystatin superfamily (1). Like Cystatin A, it is an intracellular inhibitor regulating the activities of cysteine proteases of the papain family such as cathepsins B, H and L (2). Mutations in the Cystatin B gene is the cause of progressive myoclonus epilepsy (EPM1) (3). Because of its expression patterns, Cystatin B can be used as a marker for certain cancers, such as glioblastoma tumors (4). It readily forms amyloid fibrils in vitro (5). The human Cystatin B consists of 98 amino acid residues (3).
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