ELISA Kit for Carbonic Anhydrase I (CA1)

CA-I; CAI; Car1; CAB; Carbonic anhydrase B; Carbonate dehydratase I


This assay has high sensitivity and excellent specificity for detection of Carbonic Anhydrase I (CA1).
No significant cross-reactivity or interference between Carbonic Anhydrase I (CA1) and analogues was observed.


Matrices listed below were spiked with certain level of recombinant Carbonic Anhydrase I (CA1) and the recovery rates were calculated by comparing the measured value to the expected amount of Carbonic Anhydrase I (CA1) in samples.

Matrix Recovery range (%) Average(%)
serum(n=5) 80-90 84
EDTA plasma(n=5) 98-105 101
heparin plasma(n=5) 96-104 101


Intra-assay Precision (Precision within an assay): 3 samples with low, middle and high level Carbonic Anhydrase I (CA1) were tested 20 times on one plate, respectively.
Inter-assay Precision (Precision between assays): 3 samples with low, middle and high level Carbonic Anhydrase I (CA1) were tested on 3 different plates, 8 replicates in each plate.
CV(%) = SD/meanX100
Intra-Assay: CV<10%
Inter-Assay: CV<12%


The linearity of the kit was assayed by testing samples spiked with appropriate concentration of Carbonic Anhydrase I (CA1) 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) 88-96% 98-105% 98-105% 81-104%
EDTA plasma(n=5) 78-90% 91-102% 87-103% 90-99%
heparin plasma(n=5) 96-103% 82-90% 91-105% 98-105%


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.



Magazine Citations
PLoS ONE Identification of Altered Plasma Proteins by Proteomic Study in Valvular Heart Diseases and the Potential Clinical Significance PubMed: PMC3754973
Proteomics Clinical Applications Comparative mass spectrometric and immunoassay‐based proteome analysis in serum of Duchenne muscular dystrophy patients Pubmed:26680509
Am J Trop Med Hyg. Serum Carbonic Anhydrase 1 is a Biomarker for Diagnosis of Human Schistosoma mansoni Infection. pubmed:28500821
Journal of Chromatography A Application of a new procedure for liquid chromatography/mass spectrometry profiling of plasma amino acid-related metabolites and untargeted shotgun proteomics to identify mechanisms and biomarkers of calcific aortic stenosis S0021967317311858
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