Stefin B (CSTB) (NM_000100) Human Recombinant Protein

Specifications

Product Data
Species	Human
Expression Host	HEK293T
Expression cDNA Clone or AA Sequence	Protein Sequence (showhide) >RC203872 protein sequence Red=Cloning site Green=Tags(s) MMCGAPSATQPATAETQHIADQVRSQLEEKENKKFPVFKAVSFKSQVVAGTNYFIKVHVGDEDFVHLRVF QSLPHENKPLTLSNYQTNKAKHDELTYF TRTRPLEQKLISEEDLAANDILDYKDDDDKV
Tag	C-Myc/DDK
Predicted MW	11 kDa
Concentration	>0.05 µg/µL as determined by microplate BCA method
Purity	> 80% as determined by SDS-PAGE and Coomassie blue staining
Buffer	25 mM Tris-HCl, 100 mM glycine, pH 7.3, 10% glycerol
Preparation	Recombinant protein was captured through anti-DDK affinity column followed by conventional chromatography steps.
Note	For testing in cell 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
Refseq Size	940
Cytogenetics	21q22.3
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]

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