Heavy-chain meaning

The larger of the two types of polypeptide chains in immunoglobulins, consisting of an antigen-binding portion having a variable amino acid sequence, and a constant region that defines the antibody class.
noun
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Either of the two larger polypeptide chains in an immunoglobulin molecule, consisting of a variable region that contains the antigen-binding portion and a constant region that is specific to each immunoglobulin class or subclass.
noun
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The larger of the two types of polypeptide chains in an immunoglobulin molecule. A heavy chain consists of an antigen-binding portion having a variable amino acid sequence, and a constant region that is different for each class of imunoglobulin. Each heavy chain is one of a Y-shaped identical pair and is attached along its variable region to a smaller light chain.
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