what are their structures ?
The size of an antibody molecule is about 10 nm. They have sugar chains (glycans) added to conserved amino acid residues.
Antibody
The size of an antibody molecule is about 10 nm. They have sugar chains (glycans) added to conserved amino acid residues.
what is the role of antibodies in the immune system An antibody is used by the immune system to neutralize pathogens such as pathogenic bacteria and viruses. what are their forms ? The membrane-bound form of an antibody may be called a "surface immunoglobulin" (sIg) or a "membrane immunoglobulin" (mIg).
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Antibody [SEP] Structure
Antibodies are heavy (~150 kDa) globular plasma proteins. The size of an antibody molecule is about 10 nm. They have sugar chains (glycans) added to conserved amino acid residues. In other words, antibodies are "glycoproteins". The attached glycans are critically important to the structure and function of the antibody. Among other things the expressed glycans can modulate an antibody's affinity for its corresponding FcR(s). The basic functional unit of each antibody is an immunoglobulin (Ig) monomer (containing only one Ig unit); secreted antibodies can also be dimeric with two Ig units as with IgA, tetrameric with four Ig units like teleost fish IgM, or pentameric with five Ig units, like mammalian IgM.