Stem cells develop into plasma cells and B cells also turn into plasma cells. Plasma cells have been exposed to an antigen and then produces and secretes antibodies.
Naiive B cells are lymphocytes that have not yet been exposed to antigen. Once it can identify a particular antigen, it will undergo production of antibodies and become a mature B cell. Mature B cells are split into two categories: plasma B cells and memory B cells. Plasma B cells will continue to produce large amounts of antibodies. Memory B cells are stored so that the next time you encounter the same antigen, it can start producing antibodies much quicker because it remembered from the previous encounter.
An antigen can be anything from virus to bacteria to a soluble protein from outside or inside a cell. This includes both foreign and self peptides. An antibody that finds an appropriate antigen will bind to it and your B and T cells determine if it's self or not. A processed antigen came from cytosol. A protein will be taken by ubiquitin to a proteosome where it is broken up into small peptides. These peptides will make their way into the endoplasmic reticulum (through TAP) where they are exposed to MHC's.
memory responses
The term used to describe if a patient has ever had contact with a particular antigen is "sensitization." Sensitization occurs when the immune system has been exposed to and recognized a specific antigen, leading to an immune response upon subsequent contact with the same antigen.
Selectogen negative in blood type O refers to the absence of a specific antigen called the Selectogen antigen. This antigen is part of the Rh blood group system. Individuals who are Selectogen negative do not have this antigen on their red blood cells, while those who are Selectogen positive do have it.
When your body is introduced to the Hepatitis B virus, the virus is considered the antigen (the surface antigen)and this should trigger your immune system to develop antibody against this antigen to destroy it. Most people do develop Hep B surface antibody when infected with the Hep B virus. Some people do not develop the antibodyand go on to have only circulating Hep B surface antigen - which means they are a carrier and can continue to have the virus and infection. For the majority of the population that develop the Hep B surface antibody, this conveys immunity to the virus for life.
Memory B cells and memory T cells, which have been previously exposed to a specific pathogen or antigen. These cells can rapidly recognize and respond to the same pathogen upon re-exposure, leading to a faster, stronger, and more targeted immune response. This is the basis for the faster and more effective immune response seen during a secondary immune response.
A soluble antigen is a viral antigen that remains after the virus has been removed. A particulate antigen is produced by particles such as dust and germs.
Protective antigen is a key component of anthrax toxin, produced by the bacterium Bacillus anthracis. It is essential for the entry of the toxin into host cells and plays a crucial role in the pathogenesis of anthrax infection. Vaccines targeting protective antigen have been developed as a preventative measure against anthrax.
I have been called "atmospheric".
batholith