CONTENTS 



Introduction : Otto Warburg, artisan of cell chemistry 



by D. BuRK (Berlin-Dahlem) 9 



The biosynthesis of glucosamine 



by L. F. Leloir and C. E. Cardini (Buenos Aires) 15 



Correlation between photosynthesis and light-independent metabolism in the growth oiChlorella 



by H. Tamiya, T. Iwamura, K. Shibata, E. Hase and T. Nihei (Tokyo) 23 



Growth and phage production of B. megatherium. IV. Kinetics of cell growth, phage production, 



and protein and nucleic acid synthesis in lysogenic megatherium cultures 



by J. H. Northrop (Berkeley) 41 



Kristallisiertes 3-Carbonsaureamid-N^-D-ribosido-pyridiniumbromid und verwandte Verbin- 



dungen 



von P. Karrer, M. Viscontini und R. Hochreuter (Ziirich) 51 



On the mechanism of enzyme action. LV. A study of the interaction between calcium and trypsin 



by F. F. Nord and M. Bier (New York) 56 



On the photochemical reduction of nitrate by algae 



by C. B. VAN Niel, M. B. Allen and B. E. Wright (Pacific Grove, Calif.) 67 



The reaction of the carcinogenic dibenzcarbazoles and dibenzacridines with purines and 



nucleic acid 



by J. Booth and E. Boyland (London) 75 



Effect of the presence of labile methyl groups in the diet on labile methyl neogenesis 



by V. Du Vigneaud, J. M. Kinney, J. E. Wilson and J. R. Rachele (New York) ... 88 

 L'etude quantitative des isohemagglutinines et le probleme de leur formation 



par R. Wurmser et S. Filitti-Wurmser (Paris) 92 



Reversibility of glucose-6-phosphate oxidation 



by B. L. Horecker and P. Z. Smyrniotis (Bethesda, Md.) 98 



Amino acid interactions in strict anaerobes {CI. sporogenes) 



by R. Mamelak and J. H. Quastel (Montreal) 103 



Heat of hydrolysis of trimetaphosphate 



by O. Meyerhof, R. Shatas and A. Kaplan (Philadelphia) 121 



The series elastic component in muscle 



by D. E. Philpott and A. Szent-Gyorgyi (Woods Hole, Mass.) 128 



Uber den Wirkungsmechanismus des Dicumarols und verwandter Verbindungen 



von C. Martius und D. Nitz-Litzow (Tubingen) 134 



Acetyl coenzyme A synthesis through pyrophosphoryl split of adenosine triphosphate 



by M. E. Jones, S. Black, R. M. Flynn and F. Lipmann (Boston) 141 



Muskelkontraktion, Zellmotilitat und ATP 



von H. H. Weber (Tubingen) 150 



Enzymic studies on ascitic tumors and their host's blood plasmas 



by A. L. Schade (Bethesda, Md.) 163 



Some reactions of adenosine and inosine phosphates in animal tissues 



by H. A. Krebs and R. Hems (Sheffield) 172 



On the composition of the soluble nitrogen fraction in the pea plant and alder 



by A. I. ViRTANEN AND J. K. MiETTiNEN (Helsinki) 181 



The enzymic oxidation of d- and /-/3-hydroxybutyrate 



by A. L. Lehninger and G. D. Greville (Baltimore/Cambridge) 174 



68 



'C. < ■;' 6 .■ 



