The B-cell co-receptor is a transmembrane signaling receptor composed of CD19, CD81, and complement receptor 2 (CD21), binding complement fragments on bacterial antigens and enhancing antigen responsiveness when co-ligated with the B-cell receptor.
El co-receptor de células B es un complejo transmembrana formado por CD19, CD81 y el receptor de complemento CR2 (CD21), que se une a fragmentos del complemento en antígenos bacterianos y potencia la respuesta al antígeno al co-estimular el receptor de células B.
| Front | A transmembrane signaling receptor on the B-cell surface composed of the proteins CD19, CD81, and CD21 complement receptor 2, which binds complement fragments on bacterial antigens also bound by the B-cell receptor. Co-ligation of this complex with the B-cell receptor increases responsiveness to antigen about 100-fold |
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| Back | B-cell co-receptor |
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