Outer Membrane Porins.

@article{Masi2019OuterMP,
  title={Outer Membrane Porins.},
  author={Muriel Masi and Mathias Winterhalter and Jean-Marie Pag{\'e}s},
  journal={Sub-cellular biochemistry},
  year={2019},
  volume={92},
  pages={
          79-123
        }
}
The transport of small molecules across membranes is essential for the import of nutrients and other energy sources into the cell and, for the export of waste and other potentially harmful byproducts out of the cell. While hydrophobic molecules are permeable to membranes, ions and other small polar molecules require transport via specialized membrane transport proteins . The two major classes of membrane transport proteins are transporters and channels. With our focus here on porins-major class… 
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