The cells that are responsible for adaptive immunity are known as lymphocytes. The body contains two types of lymphocytes: T-cells and B-cells. The B-cells can directly attach to the antigen molecules. However, the T-cells are able to attach only to the antigens that have proteins present on their surface. The proteins that are attached to antigens are called MHC proteins. The MHC proteins are encoded by the genes known as “major histocompatibility complex”. There are two types of MHC proteins: type I and type II MHC proteins.

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Chapter 52, Problem 9TY

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Introduction: The cells that are responsible for adaptive immunity are known as lymphocytes. The body contains two types of lymphocytes: T-cells and B-cells. The B-cells can directly attach to the antigen molecules. However, the T-cells are able to attach only to the antigens that have proteins present on their surface. The proteins that are attached to antigens are called MHC proteins. The MHC proteins are encoded by the genes known as “major histocompatibility complex”. There are two types of MHC proteins: type I and type II MHC proteins.

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