The heterogeneity of topics...is very ambitious, and the result is, overall, successful because of the high quality of the individual contributions....highly recommended. -<em>American Scientist</em>, from a review of a previous volume Volume 26 examines the emerging areas of signal transduction based on myoinositol phosphates and Ca<sup>2+</sup> while focusing on plant and animal responses. Chapters explore synthesis, separation, and identification of different inositol phosphates.