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ELISA Kit for Heat Shock Protein 90kDa Beta 1 (HSP90b1)

HSP90-B1; ECGP; GP96; GRP94; TRA1; Glycoprotein 96; Tumor Rejection Antigen(gp96)1;94 kDa glucose-regulated protein; Endoplasmin

Specificity

This assay has high sensitivity and excellent specificity for detection of Heat Shock Protein 90kDa Beta 1 (HSP90b1).
No significant cross-reactivity or interference between Heat Shock Protein 90kDa Beta 1 (HSP90b1) and analogues was observed.

Recovery

Matrices listed below were spiked with certain level of recombinant Heat Shock Protein 90kDa Beta 1 (HSP90b1) and the recovery rates were calculated by comparing the measured value to the expected amount of Heat Shock Protein 90kDa Beta 1 (HSP90b1) in samples.

Matrix Recovery range (%) Average(%)
serum(n=5) 84-99 92
EDTA plasma(n=5) 83-99 88
heparin plasma(n=5) 80-94 83

Precision

Intra-assay Precision (Precision within an assay): 3 samples with low, middle and high level Heat Shock Protein 90kDa Beta 1 (HSP90b1) were tested 20 times on one plate, respectively.
Inter-assay Precision (Precision between assays): 3 samples with low, middle and high level Heat Shock Protein 90kDa Beta 1 (HSP90b1) were tested on 3 different plates, 8 replicates in each plate.
CV(%) = SD/meanX100
Intra-Assay: CV<10%
Inter-Assay: CV<12%

Linearity

The linearity of the kit was assayed by testing samples spiked with appropriate concentration of Heat Shock Protein 90kDa Beta 1 (HSP90b1) and their serial dilutions. The results were demonstrated by the percentage of calculated concentration to the expected.

Sample 1:2 1:4 1:8 1:16
serum(n=5) 80-95% 85-97% 85-101% 92-99%
EDTA plasma(n=5) 98-105% 79-102% 81-101% 89-97%
heparin plasma(n=5) 90-104% 93-105% 79-101% 94-101%

Stability

The stability of kit is determined by the loss rate of activity. The loss rate of this kit is less than 5% within the expiration date under appropriate storage condition.
To minimize extra influence on the performance, operation procedures and lab conditions, especially room temperature, air humidity, incubator temperature should be strictly controlled. It is also strongly suggested that the whole assay is performed by the same operator from the beginning to the end.

Reagents and materials provided

Reagents Quantity Reagents Quantity
Pre-coated, ready to use 96-well strip plate 1 Plate sealer for 96 wells 4
Standard 2 Standard Diluent 1×20mL
Detection Reagent A 1×120µL Assay Diluent A 1×12mL
Detection Reagent B 1×120µL Assay Diluent B 1×12mL
TMB Substrate 1×9mL Stop Solution 1×6mL
Wash Buffer (30 × concentrate) 1×20mL Instruction manual 1

Assay procedure summary

1. Prepare all reagents, samples and standards;
2. Add 100µL standard or sample to each well. Incubate 1 hours at 37°C;
3. Aspirate and add 100µL prepared Detection Reagent A. Incubate 1 hour at 37°C;
4. Aspirate and wash 3 times;
5. Add 100µL prepared Detection Reagent B. Incubate 30 minutes at 37°C;
6. Aspirate and wash 5 times;
7. Add 90µL Substrate Solution. Incubate 10-20 minutes at 37°C;
8. Add 50µL Stop Solution. Read at 450nm immediately.

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Magazine Citations
Cell Stress and Chaperones The influence of high-fat, high-sugar diet and bariatric surgery on HSP70 and HSP90 plasma and liver concentrations in diet-induced obese rats Pubmed: 30840227
Biology-Basel Biomechanical Properties of Blood Plasma Extracellular Vesicles Revealed by Atomic Force Microscopy 33374530
Cell Death & Disease The HSP GRP94 interacts with macrophage intracellular complement C3 and impacts M2 profile during ER stress 33483465
Front Med Four-protein model for predicting prognostic risk of lung cancer Pubmed:35266102
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