Complex sentence: This can help control enzymes that may be damaging to a cell, such as proteases or nucleases; a well-characterised example is the ribonuclease inhibitor, which binds to ribonucleases in one of the tightest known protein--protein interactions.
Split into simpler sentences: This can help control enzymes that may be damaging to a cell, like proteases or nucleases. A well-characterized example of this is the ribonuclease inhibitor, which binds to ribonucleases in one of the tightest known protein--protein interactions.