Antigens, also known as immunogens, are toxins or compounds in our blood that cause our body to resist them for being foreign substances while Antibodies is Y-shaped proteins produced by B lymphocytes or B cells in our immune system.

1. Difference Between Antigen and
Antibody
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2. Antigens, also known as immunogens, are toxins or compounds in
our blood that cause our body to resist them for being foreign
substances. Antigens are mainly bacteria or viruses, but they can
also be foreign substances that pose a health risk.
Antigens activate our body’s disease-fighting white blood cells,
known as lymphocytes. They stimulate white blood cells to produce
cells called antibodies that try to protect our body by attacking these
antigens.
Heteroantigens and autoantigens are the two primary categories of
antigens. Heteroantigens are compounds that are not manufactured
by or found naturally in our body, and they include substances such
as protozoa, bacteria, viruses, snake venom, and other elements.
Autoantigens, also known as self-antigens, are proteins produced
naturally by our body to combat our cells and usually indicate an
autoimmune disease. These mostly help to strengthen our immune
system by helping our body generate antibodies before any external
antigens can even enter the body.
What Is Antigen?

3. Antibodies Y-shaped proteins produced by B lymphocytes or B cells
in our immune system. These B lymphocytes assault and remove
viruses and other poisons. They accomplish this by developing
antibodies that are specific to a single antigen.
These antigen-specific antibodies bind to their antigens and mark
them for any attack. Thus, they ensure our bodies and all our healthy
cells remain safe from any antigen attack.
Antibodies (immunoglobulins) come in a variety of forms.
•IgG
These are the antibodies that are found in the highest concentration
in our plasma. They cleanse the body of harmful toxins while also
providing long-term protection.
•IgM
These are the earliest antibodies produced by B cells in response to
antigens.
•IgA
These antibodies bind to antigens and transport them out of your
body through mucus or other bodily fluids.
What Is Antibody?

4. Differences Between Antigen And
Antibody
Here are the critical differences between antigens and antibodies –
•Antibodies, also known as Immunoglobulins, have protein, a molecule
type, while antigens have a lipid molecular type. However, antigens can
also have nucleic acids, carbohydrates, and proteins as their molecular
type.
•While antigens cause illnesses and allergic reactions, antibodies help
the body protect itself against these antigens’ effects.
•Lastly, antigens originate outside the body, while antibodies form inside
the body. Antibodies are formed in response to antigens – they help
immobilize antigens to protect the body from allergies or illnesses.
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