underwound造句

例句与造句

1. The two lobes of the figure eight will appear rotated either clockwise or counterclockwise with respect to one another, depending on whether the helix is over-or underwound.
2. As a transcription bubble proceeds, DNA ahead of the transcription fork becomes overwound, or positively supercoiled, while DNA behind the transcription bubble becomes underwound, or negatively supercoiled.
3. All naturally occurring DNA circles are underwound, but ethidium bromide which intercalates into circular DNA can change the charge, length, as well as the superhelicity of the DNA molecule, therefore its presence during electrophoresis can affect its movement in gel.
4. But as the pH increases, and the secondary helical structure begins to denature and unwind, the chromosome ( if we may speak anthropomorphically ) no longer " wants " to have the full Watson-Crick winding, but rather " wants ", increasingly, to be " underwound ".
5. If DNA is underwound, it will be under strain, exactly as a metal spring is strained when forcefully unwound, and that the appearance of supertwists will allow the chromosome to relieve its strain by taking on negative supertwists, which correct the secondary underwinding in accordance with the topology equation above.
6. It's difficult to find underwound in a sentence. 用underwound造句挺难的