The lap concludes with another right-hand hairpin (Racetrack Hairpin) onto the pit straight. A palindromic nucleotide sequence is capable of forming a hairpin. These residues are critical for nicking the DNA strand and for forming the DNA hairpin. The structure is also known as a hairpin or hairpin loop. The preprotein is translocated through TOM as hairpin loops. A tetraloop is a four-base pairs hairpin RNA structure. The Dicer enzyme catalyzes production of siRNAs from long dsRNAs and small hairpin RNAs. PCSK9 degrades LDLR by preventing the hairpin conformational change of LDLR. Alonso spun 180 degrees at the Loews hairpin and blocked the track. Massa then retook fifth from Grosjean on the straight linking the hairpin. Three laps later Pironi punted Depailler out of the way at the Loews Hairpin. Ryousuke overtakes Takumi at the five hairpin turns. At a hairpin turn, she went off the road. On lap 49, Kvyat retired with a drivetrain fault at the hairpin. However, the radius of curvature is much larger than that of a typical road hairpin.