A chemical compound found in the muscles of herring and related fish that plays a role in oxygen storage and energy metabolism.
From Latin 'clupea' (herring) + German suffix '-in' (chemical compound). The term was coined in the 19th century when scientists began isolating specific compounds from fish tissues.
Clupeine is essentially the fish equivalent of human hemoglobin—it's how herrings store oxygen in their muscles. Interestingly, this compound is rich in nitrogen and helps these fish survive in varying oxygen conditions, making it a fascinating adaptation to ocean life.
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