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no, not entirely. Each antibody (Immunoglobulin, "Ig") has both 2 constant regions referred to as "heavy hains" and 2 variable regions referred to as "light chains". The structure of the heavy chains remain the same between the different antibody structures. However, the light chains differ in structure enabling them to respond differently to different specific antigens introduced to the cellular membrane.

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How many genes are there in DNA?

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