CD40l

a type II transmembrane protein present on activated CD4-positive T cells, a few activated CD8-activated T cells, and blood basophils; a ligand for CD40 that induces activation, proliferation, and/or differentiation of CD40-expressing cells.

CD40LG

A gene on chromosome Xq26 that encodes of a protein expressed on the surface of T cells which regulates B-cell function by binding CD40 to the B-cell surface. CD40LG is critical for immunoglobulin class switching.
Molecular pathology
A defect in CD40LG is associated with hyper IgM syndrome due to an inability to undergo class switch.

单词	cd40l
释义	CD40l CD40l a type II transmembrane protein present on activated CD4-positive T cells, a few activated CD8-activated T cells, and blood basophils; a ligand for CD40 that induces activation, proliferation, and/or differentiation of CD40-expressing cells. CD40LG A gene on chromosome Xq26 that encodes of a protein expressed on the surface of T cells which regulates B-cell function by binding CD40 to the B-cell surface. CD40LG is critical for immunoglobulin class switching. Molecular pathology A defect in CD40LG is associated with hyper IgM syndrome due to an inability to undergo class switch.
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