Metal Assimilation Pathways

摘要: Publisher Summary This chapter describes how the metal ions that are essential for living organisms assimilated from their surroundings. The importance of assimilation bacteria is perhaps best illustrated by correlation between efficacy iron uptake systems and virulence in many strains pathogenic bacteria. Most nutrients required Gram-negative diffuse passively across outer membrane into periplasm through transmembrane channels composed porins. Scarce metals such as cobalt require active transport simply cannot depend on a process simple diffusion. Many can also acquire haem mammalian hosts secreting proteins called haemophores, which release haemoglobin to specific membrane. Few other pathogens use bound transferring lactoferrin. Because enzymes, have had develop copper zinc. In species first need be dietary sources intestinal tract subsequently transported cells different organs body bloodstream. It focuses enterocytes upper part small intestine where essentially entire constituents, whether they ions, carbohydrates, fats, amino acids, vitamins, etc., takes place. briefly reviews mechanisms plasma enter cytoplasm.