Microbiology E. coli has two major porins located in the outer membrane. The function of porins is the A Stabilization of the mesosome B Metabolism of phosphorylated intermediates C Transfer of small molecules through the outer membrane D Serologic stabilization of the O antigen 💡 Explanation E. coli has two major porins located in the outer membrane. The function of porins is the ✓ Correct Answer: C. Transfer of small molecules through the outer membrane