Components of DNA
A DNA molecule is composed of a continuous string of deoxyribonucleotides. These nucleotides are composed of:
Watson and Crick Model of DNA Structure
The following are the Watson and Crick conclusions regarding the structure of the DNA model.
Types of DNA
B is the major form that is found in the cell. But can type Z exist even though the cell doesn't have a high salt environment? Probably. Other features of the DNA molecule are present in vivo that can stabilize a Z-DNA structure under low salt or cellular conditions.
1. alternating purine/pyrimidine tracts
G C A T poly or poly C G T A
Copyright © 1997. Phillip McClean