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Multiple Choice

Which organs commonly contain LDH?

LDH is a cytosolic enzyme involved in energy metabolism that is found in many tissues, not confined to a single organ. Because of this widespread distribution, organs such as the heart, liver, kidneys, skeletal muscle, brain, and lungs all contain LDH. Different LDH isoenzymes are more abundant in some tissues (for example, LDH-1 in heart and red blood cells, LDH-5 in liver and skeletal muscle), but overall LDH is present across these organs. Therefore, including all of these organs—kidneys, heart, skeletal muscle, brain, liver, and lungs—best reflects where LDH is commonly found.

LDH is a cytosolic enzyme involved in energy metabolism that is found in many tissues, not confined to a single organ. Because of this widespread distribution, organs such as the heart, liver, kidneys, skeletal muscle, brain, and lungs all contain LDH. Different LDH isoenzymes are more abundant in some tissues (for example, LDH-1 in heart and red blood cells, LDH-5 in liver and skeletal muscle), but overall LDH is present across these organs. Therefore, including all of these organs—kidneys, heart, skeletal muscle, brain, liver, and lungs—best reflects where LDH is commonly found.