antibodies
These proteins are part of the complement system, which forms a crucial part of the immune response. Once activated, the complement proteins can lead to the destruction of pathogens through processes such as opsonization, inflammation, and cell lysis.
They have receptors lining their membrane which aid in locating sources of antigens by the chemicals they release.
Antibodies.
Proteins that are pathogens are called antigens. These antigens can trigger an immune response in the body, leading to the production of antibodies to fight off the pathogen.
Antibodies are proteins produced by the body's immune system that specifically target and destroy antigens, such as bacteria or viruses, by binding to them and marking them for destruction.
Immunoglobulins, specifically IgG antibodies, play a key role in neutralizing antigens by binding to them and enhancing their removal from the body. These proteins are produced by B lymphocytes in response to the presence of antigens.
They are made up of proteins and carbohydrates.
antigens
complement fixation and activation of the antibody
No
Major histocompatibility complex (MHC) proteins, also known as human leukocyte antigens (HLAs), are self antigens found on cell membranes. These proteins play a key role in presenting foreign antigens to the immune system for recognition.
To recognize antigens.