constant region

noun

Medical Definition of constant region

: the part of the polypeptide chain of a light or heavy chain of an antibody that ends in a free carboxyl group −COOH and that is relatively constant in its sequence of amino acid residues from one antibody to another

called also constant domain

— compare variable region

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Cite this Entry

“Constant region.” Merriam-Webster.com Medical Dictionary, Merriam-Webster, https://www.merriam-webster.com/medical/constant%20region. Accessed 24 Oct. 2020.

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