Porins are proteins with _______ pores which allow the movement of _____ proteins.

Porins are proteins with _______ pores which allow the movement of _____ proteins.
Porins are proteins with _______ pores which allow the movement of _____ proteins.
Porins are proteins with _______ pores which allow the movement of _____ proteins.
Porins are proteins with _______ pores which allow the movement of _____ proteins.

proteins.