Human BCL2L1/BCL-X (Bcl-2 Like Protein 1) ELISA Kit (HUES01736)

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ELISA Kit Technical ManualMSDS

Human BCL2L1/BCL-X (Bcl-2 Like Protein 1) 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 BCL2L1/BCL-X . 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 BCL2L1/BCL-X 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 BCL2L1/BCL-X, 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 BCL2L1/BCL-X. The concentration of Human BCL2L1/BCL-X in samples can be calculated by comparing the OD of the samples to the standard curve.

Assay typeSandwich
Assay time4.5h
Detection MethodColormetric
Detection Range0.31-20 ng/mL
Sensitivity0.19 ng/mL
Sample Volume Required Per Well100uL
Sample TypeSerum, plasma and other biological fluids


This kit recognizes Human BCL2L1/BCL-X in samples. No significant cross-reactivity or interference between Human BCL2L1/BCL-X 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 BCL2L1/BCL-X were tested 20 times on one plate, respectively.

Inter-assay Precision (Precision between assays): 3 samples with low, mid range and high level Human BCL2L1/BCL-X were tested on 3 different plates, 20 replicates in each plate.

Intra-assay Precision Inter-assay Precision
Mean (ng/mL)
Standard deviation0.
C V (%)5.665.453.


The recovery of Human BCL2L1/BCL-X 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)91-10196
EDTA plasma (n=5)90-10597
Cell culture media (n=5)84-9791


Samples were spiked with high concentrations of Human BCL2L1/BCL-X 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 (%)94-10894-109100-113
Average (%)10299106
1:4Range (%)89-10383-9781-96
Average (%)948988
1:8Range (%)92-10584-9682-93
Average (%)1009088
1:16Range (%)89-10383-9685-99
Average (%)958992

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 BCL2L1/BCL-X (Bcl-2 Like Protein 1) ELISA Kit (HUES01736) 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 100 µL of standard solutions into the standard wells.
    3. Add 100 µL of Sample / Standard dilution buffer into the control (zero) well.
    4. Add 100 µL 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 100 µL 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 350 µL 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 100 µL 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 90 µL 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 BCL2L1/BCL-X (Bcl-2 Like Protein 1) ELISA Kit (HUES01736) Protein Information

UniProt Protein Function:Bcl-xL: an antiapoptotic member of the Bcl-2 family. Located at the outer mitochondrial membrane and regulates outer mitochondrial membrane channel (VDAC) opening. VDAC regulates mitochondrial membrane potential, and thus controls the production of reactive oxygen species and release of cytochrome C by mitochondria, both of which are potent inducers of cell apoptosis. Two alternatively spliced isoforms have been reported.
UniProt Protein Details:

Protein type:Mitochondrial; Autophagy; Apoptosis; Membrane protein, integral

Chromosomal Location of Human Ortholog: 20q11.21

Cellular Component: cell junction; centrosome; cytoplasm; cytosol; integral to membrane; mitochondrial inner membrane; mitochondrial matrix; mitochondrial outer membrane; mitochondrion; nuclear membrane; synaptic vesicle membrane

Molecular Function:BH3 domain binding; identical protein binding; protein binding; protein heterodimerization activity; protein homodimerization activity; protein kinase binding

Biological Process: apoptotic mitochondrial changes; cell proliferation; cellular process regulating host cell cycle in response to virus; cytokinesis; DNA damage response, signal transduction resulting in induction of apoptosis; endocytosis; fertilization; germ cell development; growth; in utero embryonic development; male gonad development; mitotic cell cycle checkpoint; negative regulation of apoptosis; negative regulation of autophagy; negative regulation of neuron apoptosis; neuron apoptosis; ovarian follicle development; positive regulation of cell proliferation; regulation of mitochondrial membrane permeability; regulation of mitochondrial membrane potential; release of cytochrome c from mitochondria; response to cycloheximide; response to cytokine stimulus; spermatogenesis; suppression by virus of host apoptosis

NCBI Summary:The protein encoded by this gene belongs to the BCL-2 protein family. BCL-2 family members form hetero- or homodimers and act as anti- or pro-apoptotic regulators that are involved in a wide variety of cellular activities. The proteins encoded by this gene are located at the outer mitochondrial membrane, and have been shown to regulate outer mitochondrial membrane channel (VDAC) opening. VDAC regulates mitochondrial membrane potential, and thus controls the production of reactive oxygen species and release of cytochrome C by mitochondria, both of which are the potent inducers of cell apoptosis. Alternative splicing results in multiple transcript variants encoding two different isoforms. The longer isoform acts as an apoptotic inhibitor and the shorter isoform acts as an apoptotic activator. [provided by RefSeq, Dec 2015]
UniProt Code:Q07817
NCBI GenInfo Identifier:728955
NCBI Gene ID:598
NCBI Accession:Q07817.1
UniProt Secondary Accession:Q07817,Q5CZ89, Q5TE65, Q92976, E1P5L6,
UniProt Related Accession:Q07817
Molecular Weight:25,290 Da
NCBI Full Name:Bcl-2-like protein 1
NCBI Synonym Full Names:BCL2 like 1
NCBI Official Symbol:BCL2L1
NCBI Official Synonym Symbols:BCLX; BCL2L; Bcl-X; PPP1R52; BCL-XL/S
NCBI Protein Information:bcl-2-like protein 1
UniProt Protein Name:Bcl-2-like protein 1
UniProt Synonym Protein Names:Apoptosis regulator Bcl-X
UniProt Gene Name:BCL2L1
UniProt Entry Name:B2CL1_HUMAN
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