Thioredoxin ELISA, Human

For the determination of Human Thioredoxin in serum, EDTA plasma, urine and cell culture supernatant. Assay range: 3.91 - 250 ng/mL. Sensitivity: 0.43 ng/mL. Includes calibrator.

(no photo available)

96 tests

$698

KT-1063

COMPONENTS

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

MATERIALS REQUIRED BUT NOT SUPPLIED

1. Microplate reader with 450 ± 10 nm filter.
2. Precision single or multi-channel pipettes and disposable tips.
3. Eppendorf Tubes for diluting samples.
4. De-ionized or distilled water.
5. Absorbent paper for blotting the microtiter plate.
6. Container for Wash Solution. STORAGE All the reagents should be kept according to the labels on vials. The Calibrator, Detection Reagent A, Detection Reagent B and the 96-well strip plate should be stored at -20°C upon being received while the others should be at 4°C. The unused strips should be kept in a sealed bag with the desiccant provided to minimize exposure to damp air. Opened test kits will remain stable for 1 month, provided it is stored as prescribed above.

SAMPLE COLLECTION AND STORAGE
Plasma
Collect plasma using 3.8% sodium citrate (sodium citrate:blood = 1:9) as an anticoagulant. Centrifuge samples for 15 minutes at 1000 × g at 4°C within 30 minutes of collection. Remove plasma and assay immediately or store
samples in aliquot at -20°C or -80°C for later use. Avoid repeated freeze/thaw cycles. Note:

1. Samples to be used within 5 days may be stored at 4°C, otherwise samples must be stored at -20°C (≤1 month) or -80°C (≤2 months) to avoid loss of bioactivity and contamination.
2. When performing the assay slowly bring samples to room temperature. 3. Sample hemolysis will influence the result, so hemolytic specimen can not be detected.

REAGENT PREPARATION
Bring all kit components and samples to room temperature (18-25°C) before use.

Detection Reagent A and B
Briefly spin or centrifuge the stock Detection Reagent A and Detection Reagent B before use. Dilute to the working concentration with Assay Diluent A or B, respectively (1:100).
Wash Solution
Dilute 20 mL of Wash Solution concentrate (30X) with 580 mL of de-ionized or distilled water to prepare 600 mL of Wash Solution (1X).
ASSAY PROCEDURE SUMMARY

1. Prepare all reagents, samples and calibrators;
2. Add 100 µL calibrator or sample to each well. Incubate 2 hours at 37°C;
3. Add 100 µL prepared Detection Reagent A. Incubate 1 hour at 37°C;
4. Aspirate and wash 3 times;
5. Add 100 µL prepared Detection Reagent B. Incubate 30 minutes at 37°C;
6. Aspirate and wash 5 times;
7. Add 90 µL Substrate Solution. Incubate 15-25 minutes at 37°C;
8. Add 50 µL Stop Solution. Read at 450 nm immediately.

IMPORTANT NOTES
1. The final experimental results will be closely related to operation skills of the end users and theexperimental environments. Please make sure that sufficient samples are available.
2. Kits from different batches may be a little different in detection range, sensitivity and color developingtime. Please perform the experiment exactly according to the instruction attached in kit whileelectronic ones from our website (www.k-assay.com) is only for information.
3. Do not mix or substitute reagents from one kit lot to another. Use only the reagents supplied bymanufacturer.
4. Protect all reagents from strong light during storage and incubation. All the bottle caps of reagentsshould be covered tightly to prevent the evaporation and contamination of microorganism.
5. There may be some foggy substance in the wells when the plate is opened at the first time. It will nothave any effect on the final assay results. Do not remove microtiter plate from the storage bag untilneeded.
6. Wrong operations during the reagents preparation and loading, as well as incorrect parameter settingfor the plate reader may lead to incorrect results. A microplate plate reader with a bandwidth of 10 nmor less and an optical density range of 0-3 O.D. or greater at 450 ± 10 nm wavelength is acceptablefor use in absorbance measurement. Please read the instruction carefully and adjust the instrumentprior to the experiment.
7. Even the same operator might get different results in two separate experiments. In order to get betterreproducible results, the operation of every step in the assay should be controlled. Furthermore, apreliminary experiment before assay for each batch is recommended.
8. Each kit has been strictly passed Q.C. test. However, results from end users might be inconsistentwith our in-house data due to some unexpected transportation conditions or different lab equipments.
Intra-assay variance among kits from different batches might arise from above factors, too.
9. Kits from different manufacturers for the same item might produce different results, since we haven’tcompared our products with other manufacturers.
10. The Stop Solution suggested for use with this kit is an acid solution. Wear eye, hand, face, andclothing protection when using this material.