Die polymorphic von benzo[a]pyren

✍ Scribed by B. Contag

• Book ID: 104774702
• Publisher: Springer
• Year: 1978
• Tongue: English
• Weight: 248 KB
• Volume: 65
• Category: Article
• ISSN: 0028-1042
• DOI: 10.1007/bf00440552

✦ Synopsis

change from 6.8 cm (3.4A) to approx. 11 cm (3.5 A). This distance corresponds with the optimum freedom from tension in the model, which was determined manually 2. In the cis-ladder conformation, separation of the two single strands after the hydrogen bonds have been broken is possible without untwisting. After separation, the bases are sterically in an optimum position for replication, transcription, renaturation, and hybrid formation. The double-helix structure for DNA is a very rigid conformation. By contrast, the cis-ladder conformation is more flexible. It can be transformed, without the creation 2 A model of the A form of the DNA double helix can likewise be moved tension-free to a cis-ladder position, in which the base pairs are also tilted 20 ~ out of the horizontal of any tension, into the following doublestrand conformations: