Detailed Instructions: Given a text passage, come up with an appropriate title for it. The title should accurately represent what the main focus of the passage is. The title of a passage may be present in the first few sentences of the passage and/or be referred to multiple times in the passage. The title should be 1-5 words long.
Q: Transition state analogs ( transition state analogues ) , are chemical compounds with a chemical structure that resembles the transition state of a substrate molecule in an enzyme - catalyzed chemical reaction . Enzymes interact with a substrate by means of strain or distortions , moving the substrate towards the transition state . Transition state analogs can be used as inhibitors in enzyme - catalyzed reactions by blocking the active site of the enzyme . Theory suggests that enzyme inhibitors which resembled the transition state structure would bind more tightly to the enzyme than the actual substrate . Examples of drugs that are transition state analog inhibitors include flu medications such as the neuraminidase inhibitor oseltamivir and the HIV protease inhibitors saquinavir in the treatment of AIDS .
A:
Transition state analog