ELISA Kit for Family With Sequence Similarity 3, Member B (FAM3B)

ORF9; PANDER; PRED44; C21orf11; C21orf76; Cytokine-like protein 2-21; Pancreatic-derived factor

Specificity

This assay has high sensitivity and excellent specificity for detection of Family With Sequence Similarity 3, Member B (FAM3B).
No significant cross-reactivity or interference between Family With Sequence Similarity 3, Member B (FAM3B) and analogues was observed.

Recovery

Matrices listed below were spiked with certain level of recombinant Family With Sequence Similarity 3, Member B (FAM3B) and the recovery rates were calculated by comparing the measured value to the expected amount of Family With Sequence Similarity 3, Member B (FAM3B) in samples.

Matrix Recovery range (%) Average(%)
serum(n=5) 81-103 87
EDTA plasma(n=5) 80-88 83
heparin plasma(n=5) 90-97 94

Precision

Intra-assay Precision (Precision within an assay): 3 samples with low, middle and high level Family With Sequence Similarity 3, Member B (FAM3B) were tested 20 times on one plate, respectively.
Inter-assay Precision (Precision between assays): 3 samples with low, middle and high level Family With Sequence Similarity 3, Member B (FAM3B) 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 Family With Sequence Similarity 3, Member B (FAM3B) 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) 82-95% 79-94% 93-101% 79-101%
EDTA plasma(n=5) 90-104% 82-96% 96-105% 93-105%
heparin plasma(n=5) 79-102% 79-90% 96-103% 80-91%

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
Journal of Diabetes Investigation Elevated circulating level of a cytokine, pancreatic-derived factor, is associated with metabolic syndrome components in a Chinese population Doi: 10.1111
Molecular and Cellular Endocrinology Pancreatic-derived factor impaired glucagon-like Peptide-1 production from GLUTag enterendorine L-cell line and intestines pubmed:28549991
Scientific Reports FAM3B mediates high glucose-induced vascular smooth muscle cell proliferation and migration via inhibition of miR-322-5p pubmed:28536423
Journal of diabetes investigation Effects of circulating FAM3B on the risk of developing metabolic syndrome and its components: a five‐year prospective study pubmed:29178453
Pamukkale Tıp Dergisi The evaluation of serum Pancreatic-derived factor and Malondialdehyde levels in patients with polycystic ovary syndrome
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