Where can LDH be found?

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LDH is a ubiquitous cytosolic enzyme, present in many tissues throughout the body because it plays a key role in anaerobic glycolysis by converting pyruvate to lactate and back. This broad distribution means LDH activity is found in several organs, including the heart and skeletal muscle (where rapid energy production is critical), the brain and kidneys (high energy demands), the liver (metabolic processing), and the lungs (gas exchange tissues). Therefore, the most accurate description is that LDH is found in kidneys, heart, skeletal muscle, brain, liver, and lungs. Other options omit some of these tissues, reflecting an incomplete distribution.