Metabolism 291 Biochemistry 190 metabolism 136 Physiology 89 Microbiology 77 Photosynthesis 74 Enzymes 65 Nutrition 55 Metabolism-- Physiology 47 Lipids 44 Biology 38 Biotechnology 38 Metaphor 38 Cytology 32 Plant physiology 32 enzymes 30 Biochemica et Biophysica Acta (Journal) 29 Proteins 28 Genetics 27 Plant cell 27 Plant metabolism 24 photosynthesis 24 physiology 23 Metabolism-- Nucleic acids 22 methods 22 morphology 22 METABOLISM 21 Pharmacology and Toxicology 20 Energy metabolism 19 Microbial metabolism 19