Antibody - Wikipedia
An antibody (Ab), or immunoglobulin (Ig), is a large protein belonging to the immunoglobulin superfamily which is used by the immune system to identify and neutralize antigens such as those that exist on bacteria and virus cells, including those that cause disease.

Antibody | Definition, Structure, Function, & Types | Britannica
Antibody, a protective protein produced by the immune system in response to the presence of a foreign substance, called an antigen. Antibodies recognize and latch onto antigens in order to remove them from the body.

Antibodies: Definition, Types & Function - Cleveland Clinic
What do antibodies look like? Each antibody structure consists of two heavy chains and two light chains, which join to form a Y-shaped molecule. Each type of antibody has a different amino acid sequence at the tips of the “Y” which is why each antibody is shaped differently.

Antibody - National Human Genome Research Institute
An antibody is a protein component of the immune system that circulates in the blood, recognizes foreign substances like bacteria and viruses, and neutralizes them.

Types of Antibodies and Their Functions
Different antibody classes allow the immune system to respond effectively in different locations and stages of infection. Each antibody type has structural features that determine where it operates and how it fights pathogens.

What is an antibody? - Medical News Today
An antibody is a protein that develops in response to a foreign invader (the antigen). An antigen can be a protein, lipid, carbohydrate, or nucleic acid.

Antibodies 101: Introduction to Antibodies - Addgene
Many experiments that use antibodies use a primary antibody, which recognizes your protein of interest, and a secondary antibody, which recognizes the primary antibody and provides the method of detection.

Antibody Basics: The Complete Guide | Antibodies.com
Explore the function of antibodies in the immune system, how antibodies are used and produced in research, and how to choose the best antibody for you.

Antibodies: Definition, Types, and Function - Health
IgG: The most abundant antibody found in the body. It can help to block infections caused by bacteria, viruses, parasites, or other disease-causing organisms.

Antibody: Definition, Structure, Types, Forms, Functions
Each antibody has two light chains that are identical and only one of the two (lambda (λ) and kappa (κ)) light chains is present per antibody in mammals; therefore either of the chains can occur in any of the 5 types of heavy chains.