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How are BCR and TCR variable regions encoded?
By rearranged gene segments
Which gene segments encode heavy chains?
V, D and J
Which gene segments encode light chains?
V and J
What enzyme complex mediates recombination?
V(D)J recombinase
Which genes encode recombinase components?
RAG-1 and RAG-2
What type of DNA repair is used?
Non-homolgous end joining
Where does Ig gene rearrangement occur?
Bone marrow
What happens if RAG genes are mutated?
Immunodeficiency
Why is heavy chain rearrangement first?
It is required before light chain rearrangement
What ensures each lymphocyte has a unique receptor?
Random gene segment recombination