Seaweed, organic halides from

VHOCs was also observed in response to grazing pressure in Ascophyllum nodosum beds (Nightingale et al. 1995). Their biogenesis involves vanadium haloperoxi-dases (vHPO), which catalyse the oxidation of halides (X ) and generate X+ to yield hypohalous acid (XIO) and other forms of oxidized halides (X2, X2 ). Marine organisms and especially seaweeds have been known for a long time to concentrate halides from their environment (for a recent review, see Leblanc et al. 2006). 

Asparagopsis taxiformis is an edible red seaweed that grows on the edges of reefs in areas of constant water motion. Almost 100 different organic halides have been isolated from this source. 

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