Human CYGB(Cytoglobin)ELISA kit (HUES03334)



ELISA Kit Technical ManualMSDS

Human CYGB(Cytoglobin)ELISA kit

This ELISA kit uses Sandwich-ELISA as the method. The micro ELISA plate provided in this kit has been pre-coated with an antibody specific to Human CYGB . Standards or samples are added to the appropriate micro ELISA plate wells and combined with the specific antibody. Then a biotinylated detection antibody specific for Human CYGB and Avidin-Horseradish Peroxidase (HRP) conjugate are added to each micro plate well successively and incubated. Free components are washed away. The substrate solution is added to each well. Only those wells that contain Human CYGB, biotinylated detection antibody and Avidin-HRP conjugate will appear blue in color. The enzyme-substrate reaction is terminated by adding Stop Solution and the color turns yellow. The optical density (OD) is measured spectrophotometrically at a wavelength of 450 nm ± 2 nm. The OD value is proportional to the concentration of Human CYGB. The concentration of Human CYGB in samples can be calculated by comparing the OD of the samples to the standard curve.

Assay typeSandwich
Assay time4.5h
Detection MethodColormetric
Detection Range78.13-5000 pg/mL
Sensitivity46.88 pg/mL
Sample Volume Required Per Well100uL
Sample TypeSerum, plasma and other biological fluids


This kit recognizes Human CYGB in samples. No significant cross-reactivity or interference between Human CYGB and analogues was observed.

Typical Data

As the OD values of the standard curve may vary according to the conditions of the actual assay performance (e.g. operator, pipetting technique, washing technique or temperature effects), the operator should establish a standard curve for each test. Typical standard curve and data is provided below for reference only.

O.D Average Corrected


Intra-assay Precision (Precision within an assay): 3 samples with low, mid range and high level Human CYGB were tested 20 times on one plate, respectively.

Inter-assay Precision (Precision between assays): 3 samples with low, mid range and high level Human CYGB were tested on 3 different plates, 20 replicates in each plate.

Intra-assay Precision Inter-assay Precision
Mean (pg/mL)233.80501.242087.59227.47508.362249.57
Standard deviation15.0327.0786.8412.0321.5094.93
C V (%)6.435.404.


The recovery of Human CYGB spiked at three different levels in samples throughout the range of the assay was evaluated in various matrices.

Sample Type Range (%) Average Recovery (%)
Serum (n=5)85-9792
EDTA plasma (n=5)86-9892
Cell culture media (n=5)85-9992


Samples were spiked with high concentrations of Human CYGB and diluted with Reference Standard & Sample Diluent to produce samples with values within the range of the assay.

Serum (n=5) EDTA plasma (n=5) Cell culture media (n=5)
1:2Range (%)92-10897-10893-108
Average (%)98102101
1:4Range (%)87-9784-9985-97
Average (%)929191
1:8Range (%)90-10683-9787-100
Average (%)978994
1:16Range (%)87-10083-9386-99
Average (%)938893

Kit Components & Storage

An unopened kit can be stored at 4'C for 1 month. If the kit is not used within 1 month, store the items separately according to the following conditions once the kit is received.

Item Specifications Storage
Micro ELISA Plate(Dismountable)8 wells X12 strips-20'C, 6 months
Reference Standard2 vials
Concentrated Biotinylated Detection Ab (100X)1 vial, 120 uL
Concentrated HRP Conjugate (100X)1 vial, 120 uL-20'C(shading light), 6 months
Reference Standard & Sample Diluent1 vial, 20 mL4'C, 6 months
Biotinylated Detection Ab Diluent1 vial, 14 mL
HRP Conjugate Diluent1 vial, 14 mL
Concentrated Wash Buffer (25X)1 vial, 30 mL
Substrate Reagent1 vial, 10 mL4'C(shading light)
Stop Solution1 vial, 10 mL4'C
Plate Sealer5 pieces
Product Description1 copy
Certificate of Analysis1 copy

Human CYGB(Cytoglobin)ELISA kit (HUES03334) Assay procedure

    1. Set standard, test sample and control (zero) wells on the pre-coated plate and record theirpositions. It is recommended to measure each standard and sample in duplicate. Note: addall solutions to the bottom of the plate wells while avoiding contact with the well walls. Ensuresolutions do not foam when adding to the wells.
    2. Aliquot 100µl of standard solutions into the standard wells.
    3. Add 100µl of Sample / Standard dilution buffer into the control (zero) well.
    4. Add 100µl of properly diluted sample (serum, plasma, tissue homogenates and otherbiological fluids) into test sample wells.
    5. Cover the plate with the sealer provided in the kit and incubate for 90 min at 37°C.
    6. Aspirate the liquid from each well, do not wash. Immediately add 100µL of BiotinylatedDetection Ab working solution to each well. Cover the plate with a plate seal and gently mix.Incubate for 1 hour at 37°C.
    7. Aspirate or decant the solution from the plate and add 350µL of wash buffer to each welland incubate for 1-2 minutes at room temperature. Aspirate the solution from each well andclap the plate on absorbent filter paper to dry. Repeat this process 3 times. Note: a microplatewasher can be used in this step and other wash steps.
    8. Add 100µL of HRP Conjugate working solution to each well. Cover with a plate seal andincubate for 30 min at 37°C.
    9. Aspirate or decant the solution from each well. Repeat the wash process for five times asconducted in step 7.
    10. Add 90µL of Substrate Reagent to each well. Cover with a new plate seal and incubate forapproximately 15 min at 37°C. Protect the plate from light. Note: the reaction time can beshortened or extended according to the actual color change, but not by more than 30min.
    11. Add 50 µL of Stop Solution to each well. Note: Adding the stop solution should be done inthe same order as the substrate solution.
    12. Determine the optical density (OD value) of each well immediately with a microplate readerset at 450 nm.

Human CYGB(Cytoglobin)ELISA kit (HUES03334) Protein Information

UniProt Protein Function:CYGB: May have a protective function during conditions of oxidative stress. May be involved in intracellular oxygen storage or transfer. Belongs to the globin family.
UniProt Protein Details:

Chromosomal Location of Human Ortholog: 17q25

Cellular Component: cytosol

Molecular Function:nitric oxide dioxygenase activity; peroxidase activity; protein binding

Biological Process: regulation of nitric-oxide synthase activity; response to oxidative stress

NCBI Summary:This gene encodes a globin protein found in vertebrate cells. The encoded protein is described as a hexacoordinate hemoglobin which binds ligand differently from the pentacoordinate hemoglobins involved in oxygen transport, and may be involved in protection during oxidative stress. This gene is located on chromosome 17 in the same region as a retinal gene which is mutated in progressive rod-cone degeneration, but in the opposite orientation. [provided by RefSeq, Jan 2012]
UniProt Code:Q8WWM9
NCBI GenInfo Identifier:21263504
NCBI Gene ID:114757
NCBI Accession:Q8WWM9.1
UniProt Secondary Accession:Q8WWM9,Q541Y7, Q8N2X5,
UniProt Related Accession:Q8WWM9
Molecular Weight:21,405 Da
NCBI Full Name:Cytoglobin
NCBI Synonym Full Names:cytoglobin
NCBI Official Symbol:CYGB
NCBI Official Synonym Symbols:HGB; STAP
NCBI Protein Information:cytoglobin
UniProt Protein Name:Cytoglobin
UniProt Synonym Protein Names:Histoglobin; HGb; Stellate cell activation-associated protein
Protein Family:Cytoglobin
UniProt Gene Name:CYGB
UniProt Entry Name:CYGB_HUMAN
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