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Polyclonal antibodies (pAbs) are antibodies that are secreted by different B cell lineages within the body (whereas monoclonal antibodies come from a single cell lineage). They are a collection of immunoglobulin molecules that react against a specific antigen , each identifying a different epitope .
Hence the term "polyclonal", which derives from the words poly, meaning many, and clones from Greek klōn, meaning sprout or twig; [3] [4] [5] a clone is a group of cells arising from a common "mother" cell. The antibodies thus produced in a polyclonal response are known as polyclonal antibodies.
In immunology, antiserum is a blood serum containing antibodies (either monoclonal or polyclonal) that is used to spread passive immunity to many diseases via blood donation (plasmapheresis). For example, convalescent serum , passive antibody transfusion from a previous human survivor, used to be the only known effective treatment for ebola ...
Clonality implies the state of a cell or a substance being derived from one source or the other. Thus there are terms like polyclonal—derived from many clones; oligoclonal [2] —derived from a few clones; and monoclonal—derived from one clone. These terms are most commonly used in context of antibodies or immunocytes.
Clonal antibodies can either be monoclonal or polyclonal. Monoclonal antibodies are clones of one antibody; therefore, monoclonal antibodies can only bind to one target. Polyclonal antibodies are clones of multiple antibodies and immune cells, so they can bind to various targets. [4] Recombinant clonal antibodies are produced through in-vitro ...
The antibodies can be isolated from the animal's whole serum. Polyclonal antibody production will result in a mixture of different antibodies and will recognize multiple epitopes. Monoclonal antibodies are made by injecting the animal with the antigen of interest and then isolating an antibody-producing B cell, typically from the spleen.
Overall, antibodies must bind to the antigens with a high specificity and affinity. [12] The specificity of the binding refers to an antibody's capacity to bind and only bind a single target antigen. Scientists commonly use monoclonal antibodies and polyclonal antibodies, which are composed of synthetic peptides
The descendants are capable of active liberation of soluble antibody and lymphocytes, the same functions as the parental forms. [5] [9] In 1958, Gustav Nossal and Joshua Lederberg showed that one B cell always produces only one antibody, which was the first direct evidence supporting the clonal selection theory. [6]