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A or B antigens of blood cells
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What is a non-self antigen?
A non-self antigen is a 'Foreign' cell or chemical which is not naturally found inside the body.
What substances is NOT typically perceived as an antigen?
Self-antigens
Antibodies are produced in the body and attach themselves to antigen?
Yes that is true, and they only attach to a non-self antigen, that is, an antigen not produced in the body. and they only attach to certain antigens
Is an antigen a self cell?
NO! I am currently taking an online health class and the answer was true or false to the question above, and i googled the internet and it said yes so i chose true and got the answer wrong, so no antigen is not a self cell
What does the presence of the Rh antigen mean?
Rh antigen, which is also called D antigen, indicates if the blood type is positive or negative. The presence of this antigen indicates the patient is Rh positive, the absence of this antigen reflects a blood type of Rh Negative. For example, if a person is O Positive, the Rh antigen is present.
What is the difference between a antigen and a processed antigen?
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.
When MHC will be expressed?
MHC I and MHC II are always expressed. The antigen it presents on a cells surface can be foreign or it can be self. It is the T cell that determines whether what the MHC is displaying is self or not. Remember antigen can be protein, lipid, sugars, etc.
All immunogen are antigen but all antigen are immunogen?
An Immunogen is foreign particle that triggers the body's immune system where as Antigen is also a foreign particle , due to its low molecular weight it is unable to trigger immune system. Example for antigen is Hapten
Different type of antigent?
An example of a different type of antigen is bacterium.
Which of the following is not an antigen that may be found on the surface of an erythrocyte a A antigen b B antigen c O antigen d Rh antigen?
A antigen
What is the molecule that can be recognized by the immune system?
Antigens.
Alloreactivity is a positive selection step or negative selection step?
Neither. Alloreactivity has to do with a lymphocytes reacting to a foreign antigen. Positive and negative selection are processes of central tolerance which is to say that they deal with a T cell's ability to bind self-antigen.
