B cell activation, animation

Référence de la vidéo 11936686
B cell activation, animation. B cells, or B lymphocytes, are a type of white blood cell and part of the immune system. Each B cell has a unique antigen-binding receptor (orange) on its surface. When the receptor binds its antigen it activates the B cell and triggers its proliferation. Each new B cell is a clone of the original and so carries the same receptor. The majority of the new B cells are plasma cells. These are B cells that secrete antibodies, which bind to the same antigen as the B cell receptor. When activated in a germinal centre, for example in a lymph node, some of the B cells will become memory B cells. These are long-lived cells that are able to mount an immune defence if there is a second exposure to the antigen.
Licence : Droits gérés
Crédit : Science Photo Library / Biocosmos / Francis Leroy & Marie Martinache
Model Release : Non requis
Durée : 29 Secondes
Aspect ratio : 16/9
Restrictions : -

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