So it's a pore, it's a hole inside the membrane. And what this consists of are these beta pleated sheets that run in an antiparallel direction and they basically curl and create this channel. Now, they create the channel because this, because the function of this is to basically move polar molecules across the cell membrane. In fact, the entire inner portion of the channel basically is filled with an aqueous solution, with water molecules. And what that implies is even though the outer portion of this poring structure basically consists of non polar hydrophobic amino acids so that they can interact well with the hydrophobic tails, the intersection of this porin actually must consist of these hydrophilic polar amino acids because the entire inner portion of the poor and is filled with a water solution. An aqueous solution.