Addicudo
Forum Guru
Topics: 124
Posts: 615
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Because a NAIVE B - Cell has two antigen receptors ... i.e has both Ig M and Ig D ... therefore ... each one can bind .. to an antigen .. While T call receptor .. is known as TCR and has only ONE binding site .. !
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| tompat
Forum Elite
Topics: 39
Posts: 345
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ok i got it from doc 179
the ans is every Ig binds to two antigens but every tcr binds to only one antigen.
1 B cell has 100000 molecules, IgM + IgD and 1 T cell has 100000 tcr.
so 1 b cell can bind to 200000 antigens and 1 t cell can bind to 100000 antigen , theorotically.
sure it is not because there are IgM and IgD molecules on b cell. it just because any Ig can bind to 2 antigens.
source kaplan 2004, page 303
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