Posts Tagged ‘BCA protein estimation 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.