194 



ROBERT L. SINSHEIMER 



TABLE I 

 DNA Content and Composition in Various Bacteriophages 



Phage 



T2 



T4 

 T6 

 T5 

 Tl 

 T3 

 T7 



Xvir 



Salmonella 

 P22 

 0X174 



Al 



Ref. 



Nucleotide composition 



32.5* 



32.3 



32.4 



30.3 



27 



22. 8J 



26.0 



21.3| 



23.4| 



25J 

 24.6 



o 













 19.5 

 25 

 26.1 



24.0 



27.1 



24.6 



25 



18.5 



* T2 DNA also contains 0.45 moles of 6-methylaminopurine per 100 moles of adenine.' 



t The DNA content of T6 is usually considered to be very similar to that of T2 and T4. 

 t "Preliminary" or "tentative" data. 



References 



A. D. Hershey and N. E. Melechen, Virology 3, 207 (1957). 



6 G. S. Stent and C. R. Fuerst, J. Gen. Physiol. 38, 441 (1955). 



c A. D. Hershey, M. D. Kamen, J. W. Kennedy, and H. Gest, J. Gen. Physiol. 34, 305 (1951). 



K. D. Lunan and R. L. Sinsheimer, Virology 2, 455 (1956). 

 e "Preliminary data" of J. D. Smith and L. Siminovitch, quoted by A. Lwoff, Bacteriol. Revs. 17, 269 

 (1953). 



1 A. Garen and N. D. Zinder, Virology 1, 347 (1955). 

 » R. L. Sinsheimer, ./. Mol. Biol. 1, 43 (1959). 



h G. R. Wyatt and S. S. Cohen, Biochem. J. 55, 773 (1953). 



,: D. B. Dunn and J. D. Smith, Biochem. J. 68, 627 (1958). 



' A. D. Hershey, J. Dixon, and M. Chase, J. Gen. Physiol. 36, 777 (1953). 



k V. L. Mayers and J. Spizizen, J. Biol. Chem. 210, 877 (1954). 



' D. B. Dunn and J. D. Smith, Biochem. J. 67, 484 (1957). 



'" E. H. Creaser and A. Taussig, Virology 4, 200 (1957). 



" "Tentative" data of Fraser and Nakamura, quoted by F. W. Putnam, Advances in Protein Chem. 8, 

 175 (1953). 



"Unpublished" data of Knight and Fraser, quoted by C. A. Knight, Advances in Virus Research 2, 153 

 (1954). 



p E. Volkin, L. Astrachan, and J. L. Countryman, Virology 6, 545 (1958). 



* "Unpublished" data of A. Garen and N. D. Zinder, quoted by N. D. Zinder, J. Cellular Comp. Physiol. 

 45, Suppl. 2, 23 (1955). 



