The class of an immunoglobulin is determined by the amino acid sequences of the: A. Fab Fragment B. Antigen binding sites C. Light chains D. Fc Region

The class of an immunoglobulin is determined by the amino acid sequences of the:
A. Fab Fragment
B. Antigen binding sites
C. Light chains
D. Fc Region

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Answer

• D. Fc Region
  Explanation:
  There are five classes of immunoglobulins; IgG, IgM, IgA, IgD and IgE. These immunoglobulins are differentiated by the type of heavy chain in the molecule and type of heavy chain depends on the amino acid sequence found on the Fc region of the chain.

• IgG has gamma-chains,
• IgM has mu-chains,
• IgA has alpha-chains,
• IgE has epsilon-chains, and
• IgD has delta-chains.

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