Complementarity-determining region, CDR.
Hypervariable regions are domains on immunoglobulin heavy and light chains variable regions that are in direct contact with antigen and are frequently mutated to allow diverse antigenic specificities to be recognized.
Three areas in the V region of light and heavy chains are highly variable and form distinct loops in the immunoglobulin protein structure. They are termed CDR1, CDR2, and CDR3. The other areas of the V region are more consistent in amino acid sequence and they are referred to as the framework regions (see Figure). The framework regions form β-sheets that provide the structural scaffolding to project these hypervariable region loops. CDRs 1 and 2 are encoded by the V gene segment. In heavy chains, CDR3 is encoded by part of the VH gene segment, the DH gene segment, and part of the JH gene segment (Figure). In addition, non-germline encoded nucleotides are added at the junctions of these gene segments....
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Janeway CA, Travers P, Walport M, Capra JD (eds) (1999) Immunobiology. Current Biology Publications, London, pp 79–111
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© 2004 Springer-Verlag
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(2004). Hypervariable region. In: Moreland, L.W. (eds) Rheumatology and Immunology Therapy. Springer, Berlin, Heidelberg. https://doi.org/10.1007/3-540-29662-X_1303
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-540-20625-5
Online ISBN: 978-3-540-29662-1
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