Abstract

Both plants and animals possess biochemical systems to sequentially transform glyceride lipid into fatty acid derivatives by a process that could be given the generic name, “polyunsaturated fatty acid (PUFA) cascade.” Although similarities exist between the plant and animal cascade, substantial differences exist not only in the pathways of the sequence, but also in the control mechanisms regulating the pathways and the so-called end products formed. Typically, the cascade is composed of the following steps: (a) hydrolysis of glyceride lipids by phospholipase, lipase, or other lipolytic acyl hydrolases; (b) oxidation of the released PUFA by lipoxygenase (LOX) or prostaglandin endoperoxide synthetase; and (c) enzymatic conversion of these oxidized fatty acids (either fatty acid hydroperoxides or fatty acid hydroperoxyendoperoxides) into a variety of fatty acid derivatives. The compounds produced by the cascade usually play an indispensable role in controlling certain metabolic functions of organisms.

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