A Caltech Library Service

On the Replication of Desoxyribonucleic Acid (DNA)

Delbrück, M. (1954) On the Replication of Desoxyribonucleic Acid (DNA). Proceedings of the National Academy of Sciences of the United States of America, 40 (9). pp. 783-788. ISSN 0027-8424. doi:10.1073/pnas.40.9.783.

PDF - Published Version
See Usage Policy.


Use this Persistent URL to link to this item:


The discoveries of Hershey and Chase concerning the role of DNA in transmitting genetic information in phage and of Watson and Crick concerning the structure of DNA have brought the problem of the replication of DNA into focus. The structure proposed by Watson and Crick consists of two polynucleotide chains wound helically around a common axis, tied together by hydrogen bonds between the purine and pyrimidine side chains. These side chains of the two chains are arranged so that adenine is always matched with thymine and guanine with cytosine. The sequence of bases along either chain is not subject to any restrictions, but once the sequence along one chain is given, the sequence along the other chain is completely determined. This sequence, then, constitutes the genetic information, a linear message written in a four-symbol code. The duplex of the two chains contains the information in a twofold redundance. Each chain has a directional polarity because of the nonequivalence of the 3- and 5-positions through which each pentose is linked to the preceding and the following phosphate group in the chain. This polarity runs in opposite directions in the two chains of the duplex.

Item Type:Article
Related URLs:
URLURL TypeDescription
Additional Information:© 1954 National Academy of Sciences. Communicated May 18, 1954.
Issue or Number:9
Record Number:CaltechAUTHORS:20140305-082148425
Persistent URL:
Official Citation:Delbrück, M. (1954). On the Replication of Desoxyribonucleic Acid (DNA). Proceedings of the National Academy of Sciences, 40(9), 783-788.
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:44143
Deposited By: Tony Diaz
Deposited On:05 Mar 2014 18:33
Last Modified:10 Nov 2021 16:48

Repository Staff Only: item control page