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What is required to demonstrate the presence of cells carrying weak D antigen?
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∙ 10y ago
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∙ 10y ago
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The function of an antigen-presenting cell depends on the presence of what?
MHC proteins.
Hemagglutination-inhibition test description?
It is the measures of the ability of soluble antigen to inhibit the agglutination of antigen-coated red blood cells by antibodies. In this test, a fixed amount of antibodies to the antigen in question is mixed with a fixed amount of red blood cells coated with the antigen (research on passive hemagglutination). Also included in the mixture are different amounts of the sample to be analyzed for the presence of the antigen. If the sample contains the antigen, the soluble antigen will compete with the antigen coated on the red blood cells for binding to the antibodies, thereby inhibiting the agglutination of the red blood cells.
What is a monovalent antigen?
Another term for univalent antigen
Is T cell activation antigen specific?
Yes. The first signal that a T cell receives from an antigen presenting cell (dendritic cell) is MHC presenting an antigen (foreign peptide). This gives the T cell specificity to this antigen.
What is protective antigen?
The protective antigen is the antigen an antibody binds to killing the pathogen. It more or less is the "kill spot" for the pathogen. Also known as protective epitope.
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 a nontreponemal antigen tests?
Nontreponemal antigen tests are used as screeners. They measure the presence of reagin, which is an antibody formed in reaction to syphilis.
What is reverse agglutination?
test in which the biological fluid is tested for the presence of antigen
In response to the presence of an antigen the body makes a specific blank?
antibody
The function of an antigen-presenting cell depends on the presence of what?
MHC proteins.
What releases histamineand other mediators from basophils?
Due to antigen presence if sensitized by the IgE.
What is an anergy?
An anergy is a deficiency of energy, the presence of dilute energy, or the lack of immunity to an antigen.
What does active immunity?
the immunity that results from the production of antibodies by the immune system in response to the presence of an antigen.
What does Active immunity means?
the immunity that results from the production of antibodies by the immune system in response to the presence of an antigen.
Can nucleic acids be detected by the ELISA format?
No, ELISA would not be able to detect the presence of nucleic acids. As ELISA uses a antibodies to detect the presence of a antigen. Hence as the nucleic acid is within the cell (nucleus), the antibody used does not attach themselves to the nucleic acid but to the antigen.
Why can a person of type A give to a person who is AB but not vice versa?
Because the immune system of anyone with type AB blood is used to the presence of both the A and the B antigen on red blood cells. Therefore it will not fight type A blood with the A antigen present. (The immune system never detects the lack of antigens, only their presence). On the other hand, a person with type A blood carries only the A antigen on the surface of their erythrocytes. Their immune system detects and fights the B antigen.
What is DU negative factor in blood?
Rh blood type is determined by the presence or absence of the D antigen. People who are Rh positive have the D antigen and those that are Rh negative lack this. Some people have a variant of the D antigen, called Du. Presence of Du antigen causes lab results to report the blood type as Rh negative, although the patient behaves as an Rh positive would. Du negative means a "true Rh negative" result.
