Stefin B (CSTB) (NM_000100) Human Recombinant Protein

CAT#: TP303872

Recombinant protein of human cystatin B (stefin B) (CSTB)

Product Images

Coomassie blue staining of purified CSTB protein (Cat# TP303872). The protein was produced from HEK293T cells transfected with CSTB cDNA clone (Cat# RC203872) using MegaTran 2.0 (Cat# TT210002).

Specifications

Product Data

• Species: Human
• Expression Host: HEK293T
• Expression cDNA Clone or AA Sequence:
  Protein Sequence

  >RC203872 protein sequence
  Red=Cloning site Green=Tags(s)
  
  MMCGAPSATQPATAETQHIADQVRSQLEEKENKKFPVFKAVSFKSQVVAGTNYFIKVHVGDEDFVHLRVF
  QSLPHENKPLTLSNYQTNKAKHDELTYF
  
  TRTRPLEQKLISEEDLAANDILDYKDDDDKV
• Tag: C-Myc/DDK
• Predicted MW: 11 kDa
• Concentration: >50 ug/mL as determined by microplate BCA method
• Purity: > 80% as determined by SDS-PAGE and Coomassie blue staining
• Buffer: 25 mM Tris.HCl, pH 7.3, 100 mM glycine, 10% glycerol
• Preparation: Recombinant protein was captured through anti-DDK affinity column followed by conventional chromatography steps.
• Note: For culture applications, please filter before use. Note that you may experience some loss of protein during the filtration process.
• Storage: Store at -80°C.
• Stability: Stable for 12 months from the date of receipt of the product under proper storage and handling conditions. Avoid repeated freeze-thaw cycles.

Reference Data

• RefSeq: NP_000091
• Locus ID: 1476
• UniProt ID: P04080, Q76LA1
• Cytogenetics: 21q22.3
• Refseq Size: 940
• Refseq ORF: 294
• Synonyms: CPI-B; CST6; EPM1; EPM1A; PME; STFB; ULD
• Summary: The cystatin superfamily encompasses proteins that contain multiple cystatin-like sequences. Some of the members are active cysteine protease inhibitors, while others have lost or perhaps never acquired this inhibitory activity. There are three inhibitory families in the superfamily, including the type 1 cystatins (stefins), type 2 cystatins and kininogens. This gene encodes a stefin that functions as an intracellular thiol protease inhibitor. The protein is able to form a dimer stabilized by noncovalent forces, inhibiting papain and cathepsins l, h and b. The protein is thought to play a role in protecting against the proteases leaking from lysosomes. Evidence indicates that mutations in this gene are responsible for the primary defects in patients with progressive myoclonic epilepsy (EPM1). One type of mutation responsible for EPM1 is the expansion in the promoter region of this gene of a CCCCGCCCCGCG repeat from 2-3 copies to 30-78 copies. [provided by RefSeq, Jul 2016]