Definition of heavy chain in English:

heavy chain

Syllabification: heav·y chain

noun

Biochemistry
  • The protein subunit that, as one of a pair, makes up the major part of an immunoglobulin molecule.
    More example sentences
    • Each antibody molecule is composed of four subunits - two identical heavy chains and two identical light chains.
    • All immunoglobulin molecules contain a light chain and a heavy chain.
    • One of the tests for antibodies in the dromedary blood seemed to show an error: in addition to normal four-chain antibodies, it indicated the presence of simpler antibodies composed solely of a pair of heavy chains.

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Word of the day coloratura
Pronunciation: ˌkələrəˈto͝orə
noun
elaborate ornamentation of a vocal melody