Enzyme ImmunoAssay (EIA) is a technique to detect and quantify antigens (proteins, hormones…) or antibodies in samples. It relies on the ability of an antibody to bind a specific antigen. Either the antibody or the antigen is labelled with an enzyme whose substrate is a chromogen or a fluorogen converted in a measurable product (color or fluorescence).|Enzyme-linked Immunosorbent Assay (ELISA) is a type of EIA using a solid phase (ex: microtiter plate) coated with an antigen immobilizing the molecule to detect. Over the time, scientists have extended the term ELISA to EIAs using an antibody coating the solid phase. That explains why our EIA kits using coated antibodies are also called ELISA kits.|Obestatin is an amidated peptide of 23 amino-acids with an alpha-helical secondary conformation. It was first isolated from rat stomach in 2005. Obestatin is a preproghrelin-derived peptide produced by many tissues or organs, including the stomach, pancreas, adipose tissue, skeletal muscle, and heart. Obestatin was originally identified as an anorexigenic peptide that reduces food intake and body weight by opposing the actions of ghrelin. It has also been considered to be an antidiabetic peptide that positively influences glucose and lipid metabolism. It may also play a role in the regulation of blood pressure as its plasma concentration increases in hypertensive patients. Obestatin may also have a role in the regulation of anxiety and memory improvement.
