LDH stands for which enzyme name?

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LDH stands for lactate dehydrogenase, the enzyme that catalyzes the reversible conversion between pyruvate and lactate with the cofactor NADH/NAD+. At physiological pH, the form involved is lactate, so the standard name uses lactate rather than lactic acid. This enzyme is central to anaerobic glycolysis, helping regenerate NAD+ by reducing pyruvate to lactate when oxygen is limited. There are multiple LDH isozymes with different tissue distributions, reflecting their roles in various tissues, but the name lactate dehydrogenase is the correct, widely used designation. The other options refer to different enzymes (lipase and a hypothetical leucine dehydrogenase), which are not what LDH denotes.