What are the different types of human antigen?
The most common human antigens are blood factors that determine the blood type of man. Human antigens also include antigens that help antibodies that break down and destroy foreign proteins that can cause human body damage. These antigens help the body distinguish cells that belong to the human system from foreign cells or proteins that need to be removed.
Human blood cells can contain one or both of two human antigens. These human antigens are called A and B and their presence or absence determines what a blood -type person has. People with blood type A have human antigen A and people with blood type B have human antigen B. The individual with the type of AB blood has both and people with blood types do not have one of these antigens on their red blood cells. There is also an antigen of human blood that determines whether a person has a positive or negative blood type.
The presence of a blood type antigen means that the corresponding antibody is missing in the person's system. NaopThe absence of certain antigens means that the person generates antibodies for these specific antigens and therefore must not be administered by transfusions of blood transfusions if they contain human antigen, which is not usually present in the patient's body. For example, someone with blood type A should not be administered by Blood Bine Transfusion. Unknown Blood Antigens cause an immune response that can lead to serious complications or even the patient's death.
Human antigen is created by a human leukocyte antigen system that helps identify antigens that belong to foreign proteins. The human leukocyte antigen system is coded on human deoxyribonucleic acid (DNA) per chromosome. This part of the DNA is used to create proteins that recognize antigens. The antigen identification process is called antigen presentation.
Most antigens Vlidian body are those that have entered the body through the air, bloodstream or digestive tract. They are called exogenous antigens and human immune withYstems are considered hostile. Other types of antigens that exist in the body are called endogenous antigens. They are often foreign attackers who have taken over a healthy human cell and replicated. The antigen presentation allows these attackers to be identified and destroyed by antibodies in the immune system.