yii Addendum 



The antibiotic, mitomycin C, blocks DNA synthesis 

 completely in EschericJiia coli, but does not interfere with 

 RNA synthesis or protein synthesis."' Phage-infected 

 bacteria continued DNA synthesis, but no infective par- 

 ticles were produced when high concentrations of mito- 

 mycin were present. 



A new incompletely characterized electron transport 

 component has been isolated from Mjicohacterium phleip-^ 



The mode of inhibition of electron transport by anti- 

 mycin A has been studied.--'' 



Evidence has been published for participation of a vic- 

 dithiol in oxidative phosphorylation.'--' 



A review of ion transport and respiration has been pub- 

 lished."'' 



ATP can replace light in bacterial photosynthesis. This 

 discovery was made with the use of the obligate photo- 

 troph chromatium. An acetate medium is adequate, and 

 carbon dioxide is not required. ^-^ 



The biosynthesis of nucleic acids has been reviewed. ^^^ 



The biosynthesis and interconversions of purines and 

 their derivatives have been reviewed. ^^^ 



0. PTERIDINES AND FLAVINES 



The prosthetic group of a chromoprotein from myco- 

 bacteria may be a pteridine.^"*^ 



In the fly, Drosophila melanogaster, labeling studies 

 indicate that glucose carbon atoms are specifically in- 



--■* M. Sakiguchi and Y. Takagi, Biochim. et Biophys. Acta 41 434 

 (1960). 



--=W. B. Sutton, Federation Proc. 19 31 (1960). 



"«A. L. Tappel, Biochem. Pharmacol 3 289 (1960). 



"' Arvan Fluharty and D. R. Sanadi, Proc. Nat. Acad. Sci. U.S.A. 

 46 608 (1960). 



228 R. N. Robertson, Biol. Revs. 35 231-265 (1960). 



22^ M. Losada, A. V. Trebst, S. Ogata and Daniel I. Arnon, Nature 

 186 753 (1960). 



2'"' Arthur Romberg, Reviews of Modern Physics 31 200-209 

 (1959). 



-•''^ Albert G. Moat and Herman Friedman, Bacteriol. Revs. 24 309 

 (1960). 



232 F. B. Cousins, Biochim. et Biophys. Acta 40 532 (1960). 



