anionic protein造句

For example, the large anionic proteins in blood plasma are not permeable to capillary walls.
This is balanced by instating a functionally impermeant cation extracellularly to counter the anionic protein, Na +.
Because small cations are attracted, but are not bound to the proteins, small anions will cross capillary walls away from the anionic proteins more readily than small cations.
It's difficult to find anionic protein in a sentence. 用anionic protein造句挺难的