what are porins? what role do they play in diffusion?
Answers
The parents are proteins that form used for in the outer membrane of the plastics mitochondria and some bacteria following molecules up to the size of small protein to pass through does they play an important role in facilitated diffusion.
What are Porins ?
➡️Porins are beta barrel proteins that cross a cellular membrane and act as a pore, through which molecules can diffuse. Unlike other membrane transport proteins, porins are large enough to allow passive diffusion, i.e., they act as channels that are specific to different types of molecules. They are present in the outer membrane of gram-negative bacteria and some gram-positive Mycobacteria (mycolic acid-containing actinomycetes), the outer membrane of mitochondria, and the outer chloroplast membrane.
Role of Porins in Diffusion
➡️They help in facilitating the passive transport of small-sized protein molecules.