Gyrase (a form of topoisomerase) relaxes and undoes the supercoiling caused by helicase. It does this by cutting the DNA strands, allowing it to rotate and release the supercoil, and then rejoining the strands. Gyrase is most commonly found upstream of the replication fork, where the supercoils form.
TLCâs âI Am Jazzâ to premiere on July 15 The U.S. cable network has set a July 15 air date for I Am Jazz (pictured), a reality show starring transgender teen activist and YouTube personality Jazz Jennings and her family. Radarscreen Events
Watch President Obama Celebrate International Jazz Day With an All-Star Concert April 30 on ABC. Herbie Hancock plays to high school students from across the Washington D.C. area in State Dining Room of the White House in Washington, D.C. on, April 29, 2016 as part of the International Jazz Day celebration. AP Photo/Carolyn Kaster.