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 [...]
In this article we will discuss about:- 1. Definition of DNA Replication 2. Enzymes Involved In DNA Replication 3. Mechanism 4. Models 5. Watson and Crick's Model. Contents: Definition of DNA Replication Enzymes Involved In DNA Replication Mechanism of DNA Replication Models for DNA Replication Watson and Crick's Model for DNA Replication 1. Definition of Replication of DNA: One of [...]
The most common form of DNA which has right handed helix and proposed by Watson and Crick is called B-form of DNA or B-DNA. In addition, the DNA may be able to exist in other forms of double helical structure. These are A and C forms of double helix which vary from B- form in spacing between nucleotides and number [...]