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Calbindin-D9k

Meaning

Calbindin-D9k is a small, specific calcium-binding protein whose synthesis is dependent on the active form of Vitamin D, primarily expressed in the epithelial cells of the intestine and kidney. Its essential function is to bind, buffer, and facilitate the transcellular transport of calcium ions across the cell cytoplasm. This protein is a vital molecular link in the body’s overall maintenance of calcium homeostasis, which is critical for bone and neurological health.