Human Cystatin B/CSTB ELISA Kit PicoKine®

Product Name

Human Cystatin B/CSTB ELISA Kit PicoKine®

View all Cystatin B/Stefin B ELISA kits

SKU/Catalog Number

EK1205

Size

96 wells/kit, with removable strips.

*Question: How many samples can I assay/run in this kit?

Description

Human Cystatin B ELISA Kit PicoKine® (96 Tests). Quantitate Human CSTB in cell culture supernatants, serum, plasma (heparin, EDTA) , saliva, urine and human milk. 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.

Storage & Handling

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.)

Cite This Product

Human Cystatin B/CSTB ELISA Kit PicoKine® (Boster Biological Technology, Pleasanton CA, USA, Catalog # EK1205)

Clonality of Antibodies

See Datasheet for details

Standard Protein

Expression system for standard: E.coli; Immunogen sequence: M2-F98

Sensitivity

<10 pg/ml

Assay Range

62.5 pg/ml - 4,000 pg/ml

Standard Dilution Instructions

See datasheet of EK1205 for more details

Cross-reactivity

There is no detectable cross-reactivity with other relevant proteins.

Reactive Species

EK1205 is reactive to CSTB in Human samples

Validated Sample Types

cell culture supernatants, serum, plasma (heparin, EDTA) , saliva, urine and human milk.

Application Guarantee

EK1205 is guaranteed for ELISA in Human by Boster Guarantee

See how Boster Bio validate our ELISA kits: ELISA Validation Information

Background of Cystatin B/Stefin B

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.

Kit Components

Catalog Number	Description	Quantity
EK1205-CAP	Anti-Human CSTB Pre-coated 96-well strip microplate	1
EK1205-ST	Human CSTB Standard	2 vials, 10 ng/tube
EK1205-DA	Human CSTB Biotinylated antibody (100x)	100ul
AR1103	Avidin-Biotin-Peroxidase Complex (100x)	100ul
AR1106-1	Sample Diluent	30ml
AR1106-2	Antibody Diluent	12ml
AR1106-3	Avidin-Biotin-Peroxidase Diluent	12ml
AR1104	Color Developing Reagent (TMB)	10ml
AR1105	Stop Solution	10ml
AR1106-5	Wash Buffer (25x)	20ml
PLA-SEA	Adhesive plate sealers	4

*The kit components are not available for individual purchase.

Materials Required But Not Included In Kit

• Microplate Reader capable of reading absorbance at 450nm.
• Incubator.
• Automated plate washer (optional).
• 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.

Validation Standard Curve O.D. At 450nm

Concentration (pg/ml)	0	62.5	125	250	500	1000	2000	4000
O.D.	0.025	0.175	0.296	0.518	0.771	1.434	1.812	2.083

Data Example Images

Recommended Sample Dilution Ratios

According to our internal validation assays using this ELISA kit, to detect Cystatin B/Stefin B, Dilution ratio of 1:1, concentration in serum and plasma is around 1.7 ng/ml..

Intra Assay Consistency & Inter Assay Consistency

We measured random samples of Human Cystatin B/CSTB ELISA Kit PicoKine® within the same batch/lot to ensure the consistency of the kits' performances. ELISA intra assay consistency is measured using wells from the same plate/assay kit. ELISA inter assay consistency is measured using wells from different plates from the same batch production/lot.

Reproducibility

We ensure reproducibility by testing three samples with differing concentrations of Cystatin B/Stefin B in ELISA kits from four different production batches/lots.

Gene/Protein Information For CSTB (Source: Uniprot.Org, NCBI)

Alternative Names

Cystatin-B;CPI-B;Liver thiol proteinase inhibitor;Stefin-B;CSTB;CST6, STFB; CSTB CPI-B, CST6, EPM1, EPM1A, PME, STFB, ULD cystatin B cystatin-B|cystatin B (stefin B)|epididymis secretory sperm binding protein|liver thiol proteinase inhibitor

*if product is indicated to react with multiple species, protein info is based on the gene entry specified above in "species".

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