In this article we will discuss about the X-ray crystallographic studies of DNA. In 1920, the basic chemical composition of nucleic acid was elucidated through the efforts of P.A. Levene. In 1940, for the first time W.T. Astbury gave first three dimensional structure of DNA model studied through X-ray crystallography. He concluded that its flat nucleotides get stacked to form [...]
The upcoming discussion will update you about the difference between DNA and RNA. Difference # DNA: 1. DNA is originated from RNA. 2. DNA is the genetic material of almost all living organisms. 3. Except a few (e.g. Φ * 174), most of DNA viruses is double stranded. 4. Pentose Sugar is deoxyribose. 5. The bases are adenine, guanine, cytosine [...]
The below mentioned article provides notes on palindromic DNA. In the DNA molecule a variety of base sequences have been observed. Most of them do not have special features. The repeated sequences are of particular interest because they are the site of enzymatic activity and, sometimes give special features to the nucleic acid. For the first time Wilson and Thomas [...]