tighten

Different transcription initiation sites can become available as a gene is tightened or loosened, and different proteins may be created.

So the Dodgers can strengthen baseball’s best lineup, deepen their historic batting order, tighten their versatile defense, become even more exciting, more enchanting, more unbeatable.

The revitalized agency issued new standards for lead in drinking water and tightened requirements for vehicle and power plant emissions.

Still, the fact the team is even entertaining a meeting with this year’s top free agent suggests the Dodgers, for all the spending they did last offseason, aren’t tightening their purse strings yet.

That tide has turned under President Xi Jinping, whose government is tightening controls on Pride events, restricting queer representation on TV and pressuring internet sites and platforms to scrub LGBTQ-friendly content.