General Description of the Volume: The articles in this Methods in Enzymology volume reflect the integration of molecular genetics with photosynthesis. They focus on the genetic engineering of the photosynthesis apparatus, new mechanisms for genetic selection of photosynthetic mutants, biophysical and biochemical analysis of Photosystem I and Photosystem II Mutations, and Photosynthetic Gene Expression. General Description of the Series: The critically acclaimed laboratory standard for more than forty years, Methods in Enzymology is one of the most highly respected publications in the field of biochemistry. Since 1955, each volume has been eagerly awaited, frequently consulted, and praised by researchers and reviewers alike. Now with more than 300 volumes (all of them still in print), the series contains much material still relevant today--truly an essential publication for researchers in all fields of life sciences.