heavy chain

American  

noun

Immunology.

1. either of an identical pair of Y -shaped polypeptides that, together with the light chains, constitute the antibody molecule.

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heavy chain British  

noun

1. immunol a type of polypeptide chain present in an immunoglobulin molecule

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heavy chain Scientific  

/ hĕv′ē /

1. 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.

2. Compare light chain

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Etymology

Origin of heavy chain

First recorded in 1960–65

Example Sentences

See Examples For:

heavy chain

The variable domain determines binding specificity and the constant domain of the heavy chain determines the immunological mechanism of action of the corresponding antibody class.

From Textbooks ● Jun. 9, 2022

Balancing using a band and exercise ball doing pushups with a heavy chain around the neck isn’t for everyone.

From Seattle Times ● Sep. 3, 2021

Tire marks and old footprints cluttered the road. So Medina found four tractor tires left by an agent on the previous shift and attached them with a heavy chain to the rear bumper of her SUV.

From Washington Post ● Oct. 23, 2016

I remember dragging that cold, heavy chain out, and trying to put my hands up but also trying to cover myself at the same time.

From BBC ● Mar. 6, 2016

He watched Javier wrap a thick, heavy chain around his waist.

From "Anger Is a Gift" by Mark Oshiro