Answer :

A type of white blood cell called a B cell produces antibodies (B lymphocyte). In the bone marrow, stem cells give rise to B cells. ... The humoral immune system, a division of the immune system, depends on plasma cells to produce antibodies.

Antibody. An immunoglobulin (Ig), commonly referred to as an antibody (Ab), is a sizable, Y-shaped protein that is mostly produced by plasma cells and is utilised by the immune system to kill pathogens such pathogenic bacteria and viruses. The antigen, or distinctive molecule of the pathogen, is recognised by the antibody,...

Antibodies can be classified into isotypes or classes, which are various kinds. IgA, IgD, IgE, IgG, and IgM are the five antibody classes found in placental mammals.

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