INDEX 165 



Rhizobiiwi, cross-inoculation 



groups, 46 



— , isolation, 46 



Rhodomicrohium and nitrogen- 

 fixation, 50 



Rhodopseudomonas and nitrogen- 

 fixation, 50 



Rhodospirillum and nitrogen-fixa- 

 tion, 50 



Ribonuclease, 134 



Ribose, 127, 140 



Saccharomyces cerevisiae, biotin 

 and ammonia assimila- 

 tion, 25 

 , glutamic acid dehydroge- 

 nase, 12 



, a-ketoglutarate, 63 



, peptidases, 124 



Salmonella paratyphi, histidine de- 

 composition, 22 

 Salmonella typhosa, nutrition, 4 



, tryptophan synthesis, 64 



Serine, fermentation by CI. pro- 



pionicum, 21 

 — , in tryptophan synthesis, 64, 72 

 — , synthesis, 149 

 Serine deaminases, 23-5 

 Serratia marcescens, aspartase, 23 



, nitrate reduction, 40 



, peptidases, 124 



Sewage purification, 32 

 Shigella paradysenteriae, histidine 

 decomposition, 22 



, transforming factors, 134 



Shikimic acid, 73 



, 5-dehydro-, 73 



Simultaneous adaptation, 13 

 Staphylococcus, serine and threo- 

 nine deaminase, 23 

 Staphylococcus aureus and penicil- 

 lin, 151 



arginine dihydrolase, 26 



glutamine synthesis, 104 



internal free amino-acids, 82 



, polyol phosphates, 133 



, protein synthesis, 107 



Stickland reaction, 17 

 Strepogenin, 102 



Streptococcus, amino-acid decar- 

 boxylases, 27 

 — , glutamine decomposition, 98 

 — , Gp. A, proteinase, 122 

 Streptococcus faecalis, arginine di- 

 hydrolase, 26 

 , biotin and aspartic acid, 24 



Streptococcus faecalis, folic acid 

 requirement, 98 



, transaminases, 61 



, uptake of amino-acids, 82 



, utilization of peptides, loi 



Streptococcus haemolytiais and 

 glutamine, 98 



nucleases, 135 



streptokinase, 122 



Streptococcus lactis, asparagine as 



growth factor, 98 

 Streptokinase, 122 

 Streptomycin, 152, 155 

 Sulphonamides, mode of action, 1 46 

 Synthesis, alanine, 61 

 — , amino-acids, 60 

 — , arginine, 69 

 — , aspartic acid, 60-1 

 — , bacteriophage, 140 

 — , cysteine, 73 

 — , deoxyribose, 139 

 — , glutamic acid, 60-1 

 — , isoleucine, 76 

 — , leucine, 65 

 — , lysine, 75 

 — , methionine, 73 

 — , nucleosides, 140 

 — , nucleotides, 140 

 — , ornithine, 71 

 — , phenylalanine, 73 

 — , proline, 70 

 — , purines, 137 

 — , pyrimidines, 138 

 — , ribose, 140 

 — , serine, 149 

 — , threonine, 75 

 — , tryptophan, 64, 71 

 — , tyrosine, 72 

 — , valine, 76 

 Syntrophism, 69 



Tetrahymena gelei and purines, 138 



Thiohacillus denitrificans, nitrate 

 reduction, 40 



Thiorhodaceae, 5 



Thiosulphate in cysteine syn- 

 thesis, 75 



Threonine, 75 



— , fermentation, 21 



Thymine, 126-7 



Tonilopsis utilis, isotopes and 

 amino-acid synthesis, 77 



Transaminases, 60 



— , bacteria, 6i 



— , Neurospora, 61 



— , yeasts, 6i 



