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Serological testing is based on the fact that antibodies react specifically with an anigen all bacteria have the same antigens or the human body makes antibodies against bacteria?
AnswerThe human body makes specific antibodies to specific antigens (ex. proteins on a bacterial membrane) that it encounters. Bacteria do not all have the same antigens.* antibodies react specifically with an antigen
What is h and o antigens?
H antigens correspond to the antigenic type of the bacterial flagellaO antigens correspond to the antigenic type of the Lipopolysaccharide layer on the outer membrane of gram negative bacteriabacteria all have different antigenic types on their surface which react to different types of antibodies and are classified using this method. For example the pathogenic E. coli O157:H7 has the designation 157 for its O antigen meaning it will not react with antibodies with a different serotype.
To what do antibodies respond?
Antibodies are secreted by a special group of white blood cells called lymphocytes. Each type of cell (including bacteria) has a unique protein on its cell membrane - an antigen. If a lymphocyte does not recognise a particular antigen, it will assume that the cell (or bacterium) is foreign and hostile. This is what antibodies respond to - the stimulus as the result of an unfamiliar cell. The antibodies attach to the antigens and kill the cell, or bacterium.
What is the name of a surface membrane molecule that causes an immune reaction?
Antigens are surface membrane molecules that cause an immune reaction.
Can an antibody penetrate the host cell to bind intracellular antigen?
The majority of antibodies bind secreted or membrane bound antigens and do not penetrate cells. Antibodies can be taken up into cells via endocytosis. However, a subset of autoantibodies isolated from autoimmune diseases in humans and mouse models are able to penetrate cells and bind to their antigen in the cytoplasm or nucleus (e.g. anti-DNA autoantibodies).
How a T cell and B cell work together to produce antibodies?
T cells will first have to be activated by peptide presentation on MHC class II and differentiate into T helper 2 cell and T helper 2 cell will secrete cytokines IL-4, IL-5 to help B cell differentiate into a plasma cell.
Where are the antigens of the ABO blood group are located?
The antigens of the ABO blood group are located on the surface of red blood cells. These antigens determine a person's blood type (A, B, AB, O) based on the presence or absence of specific sugars on the red blood cell membrane.
Where are the blood antigens A B Rh located?
Blood antigens A and B are located on the surface of red blood cells, while the Rh antigen (Rh factor) is also found on the surface of red blood cells. These antigens determine an individual's blood type.
The antigens of the ABO blood group are located in the?
The ABO blood group antigens are located on the surface of red blood cells. These antigens determine an individual's blood type (A, B, AB, or O) and are inherited from their parents. The presence or absence of A and B antigens determines a person's blood type.
Substance that determines blood types is found in the membrane of red blood cells?
Antigens. Your blood type depends if you have A, B, AB, or none of those antigens (O). These antigens can also be positive or negative depending on whether you have the Rh antigen, or Rh factor.
What are the differences between Bcell receptors and Tcell receptors?
there are different types of b cell and t cell. both are lymphocytes, a subclass of white blood cell. the t cells are mainly used in identifying antigens and releasing chemicals which attact macrophages (big immune cells which 'eat' antigens), to destroy the antigen. b cells are used in the production of antibodies. when they encounter a new antigen, plasma cells and memory cells are formed from the division of a b cell. the memory cell remembers the antigen and which antibody to use, while the plasma cell makes the antibodies to fight a particular antigen or class of antigens
Why are electrophoretically fractionated proteins transferred to a membrane for detection?
Proteins are transferred to a membrane for detection after electrophoretic separation in order to facilitate detection of specific proteins using antibodies. This technique, known as Western blotting, allows for the visualization and quantification of target proteins by binding specific antibodies to the transferred proteins on the membrane.
