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Selenoenzymes

Meaning

Selenoenzymes are a critical, essential class of enzymes in human physiology that contain the trace element selenium in the form of the unique amino acid selenocysteine, often referred to as the 21st amino acid. These enzymes are indispensable for a wide range of vital biological functions, most notably in systemic antioxidant defense and the precise regulation of thyroid hormone metabolism. Their full biological activity is directly dependent on adequate selenium status, making them vital for maintaining cellular homeostasis and optimal endocrine function throughout the body.