opsonin

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opsonin

 [op´sŏ-nin]
an antibody that renders bacteria and other cells susceptible to phagocytosis. adj., adj opson´ic.
immune opsonin an antibody that sensitizes a particulate antigen to phagocytosis.

op·so·nin

(op'sŏ-nin),
Any blood serum protein that binds to antigens, enhancing phagocytosis (for example, C3b of the complement system, specific antibodies).
[G. opson, boiled meat, provisions, fr. hepsō, to boil, + -in]

opsonin

(ŏp′sə-nĭn)
n.
An antibody or product of complement activation in blood serum that causes bacteria or other foreign cells to become more susceptible to the action of phagocytes.

op·so·nin

(op'sŏ-nin)
A substance that binds to antigens, enhancing phagocytosis.
[G. opson, boiled meat, provisions, fr. hepsō, to boil, + -in]

opsonin

One of a number of substances, especially an antibody, naturally present in the blood that bind to the surface of bacteria to make them more readily susceptible to attack and destruction by PHAGOCYTES.

opsonin

a type of ANTIBODY which binds to ANTIGENS, increasing their susceptibility to phagocytosis by other antibodies.