Rationale for this organization 1. Natural for systematic studies and learning (as opposed to casual understanding). 2. Pedagogic purposes(teaching purposes): easy to add and delete. 3. Organization of our textbook Lehninger's is very detailed and well illustrated, good for reading and self-learning. Stryer's more advanced but less detailed. Zubay's may be in the middle). 4. Our traditional organization.Rationale for this organization 1. Natural for systematic studies and learning (as opposed to casual understanding). 2. Pedagogic purposes (teaching purposes): easy to add and delete. 3. Organization of our textbook (Lehninger’s is very detailed and well illustrated, good for reading and self-learning. Stryer’s more advanced but less detailed. Zubay’s may be in the middle). 4. Our traditional organization