Human Cystatin M/CST6 ELISA Kit PicoKine® (96 Tests). Quantitate Human CST6 in cell culture supeatants, serum and plasma (heparin, EDTA). Sensitivity: 10pg/ml. The brand Picokine indicates this is a premium quality ELISA kit. Each Picokine kit delivers precise quantification, high sensitivity, and excellent reproducibility. Only our most reliable and effective kits qualify as Picokine, guaranteeing top-tier results for your assays.
Alternative Names
Cystatin-M; Cystatin-6; Cystatin-E; CST6
Immunogen
Expression system for standard: E.coli; Immunogen sequence: R29-M149
There is no detectable cross-reactivity with other relevant proteins.
Specificity
Natural and recombinant human Cystatin m/CST6
Subcellular Localization
Secreted.
Sample Type
Cell culture supeatants, Serum, Plasma
Anticoagulant
heparin or EDTA
Precision
Intra-Assay Precision
Inter-Assay Precision
Sample
1
2
3
1
2
3
n
16
16
16
24
24
24
Mean (pg/ml)
79
382
1415
83
409
1442
Standard deviation
4.90
17.19
80.66
4.07
23.72
90.85
CV (%)
6.2%
4.5%
5.7%
4.9%
5.8%
6.3%
Protein Function
Shows moderate inhibition of cathepsin B but is not active against cathepsin C.
Background
Cystatin-M is a protein that in humans is encoded by the CST6 gene. It is mapped to 11q13.1. 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 the kininogens. The type 2 cystatin proteins are a class of cysteine proteinase inhibitors found in a variety of human fluids and secretions, where they appear to provide protective functions. This gene encodes a cystatin from the type 2 family, which is down-regulated in metastatic breast tumor cells as compared to primary tumor cells. Loss of expression is likely associated with the progression of a primary tumor to a metastatic phenotype.
Reproducibility
Lots
Lot 1 (pg/ml)
Lot 2 (pg/ml)
Lot 3 (pg/ml)
Lot 4 (pg/ml)
Mean (pg/ml)
Standard Deviation
CV (%)
Sample 1
79
79
75
76
77
1.78
2.3%
Sample 2
382
396
405
372
388
12.67
3.2%
Sample 3
1415
1318
1387
1330
1362
39.97
2.9%
*number of samples for each test n=16.
Notes
Material Required But Not Provided: Microplate Reader capable of reading absorbance at 450nm. Incubator. Automated plate washer . Pipettes and pipette tips capable of precisely dispensing 0.5 µl through 1 ml volumes of aqueous solutions. Multichannel pipettes are recommended for large amount of samples. Deionized or distilled water. 500ml graduated cylinders. Test tubes for dilution.
Gene ID
1474
Gene Name
CST6
UniProt ID
Q15828
Tissue Specificity
Restricted to the stratum granulosum of normal skin, the stratum granulosum/spinosum of psoriatic skin, and the secretory coils of eccrine sweat glands. Low expression levels are found in the nasal cavity.
Store at 4°C for 6 months, at -20°C for 12 months. Avoid multiple freeze-thaw cycles (Ships with gel ice, can store for up to 3 days in room temperature. Freeze upon receiving.)
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