Since the pioneering work of U. S. VonEuler, G. O. Burr, B. Samuelsson, and others in the field of eicosanoids, research in this area continues to grow rapidly. Novel eicosanoids are being discovered even as enzymes that ca- lyze the synthesis of well-established eicosanoids are being critically studied with respect to their regulation and function. The novice in this field will most likely encounter three areas of intense research activity: regulation of expression and function of enzymes, i.e., ph- pholipases, cyclooxygenases, and lipoxygenases involved in the syntheses of established...