How many heavy chains make up the Fe region of the antibody molecule?

Prepare for the AAB Medical Technologist (MT) Generalist Exam with flashcards and multiple choice questions. Each question includes hints and explanations to boost your understanding. Get exam-ready now!

The Fe region of an antibody molecule, also known as the Fc region, is composed of two heavy chains. This region is essential for the antibody's interactions with other components of the immune system, such as binding to Fc receptors on various immune cells, facilitating the clearance of pathogens, and activating complement pathways.

In the structure of antibodies, each molecule consists of two identical heavy chains and two identical light chains. The heavy chains are larger and contribute to the formation of the Fc region, which is responsible for the biological functions of the antibody. The specificity of the antibody, which allows it to bind to a particular antigen, is determined by the variable regions at the tips of the heavy and light chains.

Understanding that the Fe region is formed by the pairing of two heavy chains clarifies its role in immune responses, as it is integral to the functional activities of antibodies beyond mere antigen binding.

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