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- Hello today were going to talk about the five classes of immunoglobulin. we are going to discuss what they're function are.
- but first what is a immunoglobulin? immunoglobulin also know as antibodies are glycoprotein molecules produced by plasma cells or white blood cells.
- there are 5 classes of immunoglobulin IgM ( pentamer), IgG (monomer), Secretory IgA (dimer), IgE (monomer) and IgD (Monomer).
- were gonna talk about lgM first, the lgM is secreted into the blood and is responsible for early stages of immunity.
- and it also serves as the b cell receptor it is also responsible for fixing complements.
- it neutralizes toxins and opsonization it is also the main blood antibody of secondary responses.
- second is lgG, lgG are secreted by plasma cells in blood able to cross the placenta into the fetus.
- lgE are the ones responsible for allergic reactions and protects us form parasitic worms.
- third is lgE, lgE are secreted into mucus, tears, saliva and colostrum.
- fourth is lgO, lgo are antibody of allergy and anti parasitic activity.
- it is also a part of B cell receptor and activatesbasophils and mast cells.
- last is lgA, lgA are B cell receptors that are found in mucus, saliva, tears and breast milks
- lgA are the ones responsible for protecting us against pathogens
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