You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is At Tm or melting temperature, what percentage of dsDNA is denatured? and explain in detail?
Melting temperature or Tm Temperature when half (50%) of the helical structure is denatured. At lower temperature, the melted strands are re-associated; this is called annealing. When DNA is denatured, unstacking of bases occur resulting in increased absorbance at 260 nm-hyperchromicity