Posts Tagged ‘ELISA kit’

Know About The ELISA Mechanism

Friday, June 18th, 2021

Enzyme-linked immunosorbent assay (ELISA) is a procedure of target antigen (or antibody) catch in samples with a particular antibody (or antigen), as well as goal molecule detection/quantitation working with an enzyme reaction using its substrate. In ELISA, many antigen-antibody mixes are used, consistently including an enzyme-labeled antigen or antibody, and enzyme activity is measured colorimetrically.

The enzyme activity is measured with a parasite that changes colour when altered by the enzyme. Light absorption of this product made after substrate addition is quantified and converted into numerical values. You can know more about high-quality ELISA mechanisms via

Based on the antigen-antibody mix, the assay is referred to as a direct ELISA, indirect ELISA, sandwich ELISA, competitive ELISA etc. ELISA is based on the notion of antigen reactions, representing the chemical interaction between electrons made by the B cells of both leukocytes and antigens. This particular immune response plays a significant function in protecting the body from germs such as toxins and pathogens.

Consequently, by harnessing this response, ELISA enables the sensitive and discerning quantitative/qualitative evaluation of antigens, such as proteins, peptides, nucleic acids, hormones, herbicides, and plant secondary metabolites. To detect such molecules, an antigen or antibody is tagged using enzymes, the so-called enzyme immunoassay, where alkaline phosphatase, horseradish peroxidase (HRP) and β-galactosidase are usually utilized.

The antigen from the liquid phase is immobilized on a solid phase, like a microtiter plate constituting stiff polystyrene, polyvinyl chloride, and polypropylene. Afterward, the antigen is permitted to respond with a particular antibody, which can be detected through an enzyme-labeled secondary antibody. The growth of color with a chromogenic substrate corresponds to the existence of the antigen.

Use BCA Protein Estimation Kit To Measure Protein

Wednesday, June 16th, 2021

The bicinchoninic acid assay or BCA assay, also known as the Smith assay is a chemical assay for determining the overall concentration of protein like Lowry protein assay, Bradford protein assay or biuret reagent. The entire protein concentration is shown by a color change of the sample option from green to purple proportion to protein concentration.

A stock BCA alternative includes bicinchoninic acid, sodium carbonate, sodium bicarbonate, sodium tartrate, along with copper(II) sulfate pentahydrate. The BCA assay primarily depends upon two responses. The quantity of Cu2+ decreased is proportional to the quantity of protein within the solution. You can buy a high-quality BCA protein estimation kit via

Incubating the BCA assay at higher temperatures is advocated as a means to improve assay sensitivity while reducing the variances brought on by unequal amino acid makeup. The quantity of protein found in a solution can be measured by measuring the absorption spectra and comparing protein solutions of focus.

BCA Protein Assay Kit is a two-component, high-precision, detergent-compatible protein assay for determination of protein concentration. BCA reagents offer accurate determination of protein concentration with the majority of sample types encountered in protein study.

Even the BCA assay may be utilized to evaluate yields in whole cell lysates, affinity-column fractions, purified proteins samples, and to track protein contamination in industrial uses.  In comparison to the majority of dye-binding procedures, that the BCA assay is influenced less by protein compositional differences, providing higher concentration precision.

The BCA Protein Assay unites the renowned reduction of Cu2+ to Cu1+ by protein in an alkaline medium together with the highly sensitive and selective colorimetric detection of the cuprous cation (Cu1+) by bicinchoninic acid (BCA). The international peptide backbone also results in color formation, helping reduce variability brought on by protein compositional differences.

All You Need to Know About Multiplex Cytokine Assay

Friday, January 29th, 2021

Cytokines are tiny cell-signaling protein molecules that help in cellular communication, immune response, inflammation, and hematopoiesis to takes place. Cytokine Assay kits are used for the detection of these molecules for research and medical purposes.

Studying cell signaling through assay systems is reliable and effective when the ideal detection mechanism is performed. Mouse, human, and rat detection of cytokine essays are available online. You can buy high-quality multiplex cytokine assay at

The main features to look for in a cytokine assay kit are that they are sensitive, have a broad range, and have high-quality antibody pairs. The diversity in cytokine correspond to the inflammation and cancer is wide, and there is a constant need to measure multiple cytokines present in cell, serum, and plasma.

Multiplex technologies in Cytokine assays help in the detection of multiple biomarkers, all at the same time.  The complicated mixture of multiple antibodies, both bead-associated and reporter-conjugated is the limiting factor in the process of extensive multiplexing.

Also, all the antibodies need to be highly specific and sensitive to avoid any cross-reactivity in the sample set given for testing. The different sensitivities of the kits can be explained by the different antibodies used in the assay kits. It even varies according to the variation in incubation times recommended by manufacturers for the samples and beads.

All You Need to Know About Calnexin Antibody

Friday, January 29th, 2021

Calnexin Antibody is a high-quality monoclonal which is used for the detection of the protein named Calnexin in mouse, rat, and humans. Calnexin Antibody is available as both the non-conjugated anti-Calnexin antibody and multiple conjugated anti-Calnexin antibodies.

Calnexin and Calregulin are the two calcium linked proteins that are local to the endoplasmic reticulum. Calnexin is local to the membrane and Calregulin to the lumen. You can buy a high-quality calnexin antibody at

Calnexin is a type I membrane protein that communicates with newly synthesized glycoproteins present locally in the endoplasmic reticulum or ER. It helps in assembling the protein and in retaining unassembled proteins inside the ER. Calregulin has both low and high-affinity calcium-linking sites.

Both Calnexin and Calregulin do not contain the calcium-binding “E-F hand” motif which can be found in calmodulins. Both, Calnexin and Calregulin are important for the maturation of glycoproteins present inside the endoplasmic reticulum and can bind many of the same proteins.

So, calnexin is a calcium-bound protein embedded inside the ER membrane that is used to hold the freshly synthesized glycoproteins present inside the ER to ensure their proper folding and quality control. The specifics of Calnexin for a subset of glycoproteins is defined by a lectin site, which links an early oligosaccharide which intermediates on the folding glycoprotein.