See first: Energy-dependent physical and biophysical constraints (2) Emily Balskus Pins Down the Chemistry and Metabolism of Human Microbiomes Summary: The chemistry and metabolism of all microbiomes is food energy-dependent and pheromone-controlled via the physiology of reproduction. See: Feedback loops link odor and pheromone signaling with reproduction My comment to The Scientist: …trans-4-hydroxy-L-proline (Hyp) dehydratase, a newly discovered member of an abundant family of proteins, produced by gut bacteria, known as the glycyl radical enzymes, helps in metabolizing trans-Hyp, an…