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Vitamin K crystals

Vitamin K crystals

A613/0073

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Credit

DAVID PARKER / SCIENCE PHOTO LIBRARY. DAVID PARKER / SCIENCE PHOTO LIBRARY.

Caption

Polarised light micrograph of crystalline phytomenadione Vitamin K3 (Menaphthone). Vitamin K is a fat soluble vitamin which occurs in two forms: phytomenadione (of plant origin) and menaquinone (of animal origin). Its biochemical role is in the formation of prothrombin in the liver: prothrombin is an essential component in the blood clotting process. Dietary deficiency of Vitamin K should rarely occur, since the vitamin is found in both meats and leafy vegetables. Vitamin K2 is synthesized by bacteria in the large intestine. Magnification: X 63 at 35mm size.

Release details

Model release not required. Property release not required.

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