Human MUSK (Muscle Skeletal Receptor Tyrosine Kinase) ELISA Kit (HUES02391)



ELISA Kit Technical ManualMSDS

Human MUSK (Muscle Skeletal Receptor Tyrosine Kinase) 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 MUSK . 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 MUSK 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 MUSK, 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 MUSK. The concentration of Human MUSK in samples can be calculated by comparing the OD of the samples to the standard curve.

Assay typeSandwich
Assay time4.5h
Detection MethodColormetric
Detection Range0.16-10 ng/mL
Sensitivity0.10 ng/mL
Sample Volume Required Per Well100uL
Sample TypeSerum, plasma and other biological fluids


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

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

Intra-assay Precision Inter-assay Precision
Mean (ng/mL)0.551.383.970.551.383.96
Standard deviation0.
C V (%)


The recovery of Human MUSK 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)93-107100
EDTA plasma (n=5)84-9891
Cell culture media (n=5)94-107101


Samples were spiked with high concentrations of Human MUSK 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 (%)88-10096-11287-101
Average (%)9510394
1:4Range (%)88-10282-9381-93
Average (%)948787
1:8Range (%)94-11083-9487-98
Average (%)1008892
1:16Range (%)91-10883-9384-98
Average (%)998889

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 MUSK (Muscle Skeletal Receptor Tyrosine Kinase) ELISA Kit (HUES02391) 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 MUSK (Muscle Skeletal Receptor Tyrosine Kinase) ELISA Kit (HUES02391) Protein Information

UniProt Protein Function:MUSK: a receptor tyrosine kinase that is essential for the establishment and maintenance of the neuromuscular junction (NMJ). Its activation by agrin, a neuronally derived heparan-sulfate proteoglycan, and the agrin receptor (LRP4), leads to clustering of acetylcholine receptors on the postsynaptic side of the NMJ. Its activation by agrin requires Dok7, which interacts with the cytoplasmic portion of MuSK and activates its tyrosine kinase activity.
UniProt Protein Details:

Protein type:Protein kinase, tyrosine (receptor); Membrane protein, integral; Protein kinase, TK; Kinase, protein; EC; TK group; Musk family

Chromosomal Location of Human Ortholog: 9q31.3-q32

Cellular Component: postsynaptic membrane; integral to plasma membrane; neuromuscular junction; cell junction; receptor complex

Molecular Function:protein binding; protein-tyrosine kinase activity; transmembrane receptor protein tyrosine kinase activity; ATP binding

Biological Process: extracellular matrix organization and biogenesis; peptidyl-tyrosine phosphorylation; regulation of transcription, DNA-dependent; positive regulation of neuron apoptosis; protein amino acid autophosphorylation; multicellular organismal development; regulation of synaptic growth at neuromuscular junction; positive regulation of protein amino acid phosphorylation; cell differentiation; transmembrane receptor protein tyrosine kinase signaling pathway; memory; neuromuscular junction development

Disease: Myasthenic Syndrome, Congenital, 9, Associated With Acetylcholine Receptor Deficiency; Fetal Akinesia Deformation Sequence

NCBI Summary:This gene encodes a muscle-specific tyrosine kinase receptor. The encoded protein may play a role in clustering of the acetylcholine receptor in the postsynaptic neuromuscular junction. Mutations in this gene have been associated with congenital myasthenic syndrome. Alternatively spliced transcript variants have been described.[provided by RefSeq, Oct 2009]
UniProt Code:O15146
NCBI GenInfo Identifier:50400806
NCBI Gene ID:4593
NCBI Accession:O15146.1
UniProt Secondary Accession:O15146,Q32MJ8, Q32MJ9, Q5VZW7, Q5VZW8,
UniProt Related Accession:O15146
Molecular Weight:86,425 Da
NCBI Full Name:Muscle, skeletal receptor tyrosine-protein kinase
NCBI Synonym Full Names:muscle, skeletal, receptor tyrosine kinase
NCBI Official Symbol:MUSK
NCBI Protein Information:muscle, skeletal receptor tyrosine-protein kinase; muscle-specific kinase receptor; muscle-specific tyrosine-protein kinase receptor
UniProt Protein Name:Muscle, skeletal receptor tyrosine-protein kinase
UniProt Synonym Protein Names:Muscle-specific tyrosine-protein kinase receptor; MuSK; Muscle-specific kinase receptor
Protein Family:Muskelin
UniProt Gene Name:MUSK
UniProt Entry Name:MUSK_HUMAN
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