Electrochemical label free sensing of human IgG - Protein A interaction.

Karutha Pandian Divya, Venkataraman Dharuman

Food chemistry 2021 Mar 01

filter terms:

A novel and rapid Electrochemical Immunosensing platform was developed for the direct sensing of antibody human immuno globulin gamma (IgG) interaction with virulence factor of S. aureus, staphylococcal protein A (SpA) in the presence of electroactive redox couple ferri/ferro cyanide (K3/K4[Fe(CN)6]). The receptor SpA was attached to BioPE-DOTAP binary lipid bilayer tethered on alkane thiol molecular cushions. Atomic force microscopy (AFM), High-resolution transmission electron microscope (TEM), Fourier-transform infrared spectroscopy (FT-IR), dynamic light scattering (DLS) techniques were used to study the molecular interactions. The AFM images showed array like formation of BioPE-DOTAP on the monolayer surface. The IgG sensor showed a linear range from 10-21 M to 10-16 M. Copyright © 2020 Elsevier Ltd. All rights reserved.

Citation

Karutha Pandian Divya, Venkataraman Dharuman. Electrochemical label free sensing of human IgG - Protein A interaction. Food chemistry. 2021 Mar 01;339:127881