i6o 



NITROGEN METABOLISM 



Aspergillus parasiticus, peptidases, 



124 

 Athiorhodaceae, 5 

 Aureomycin, 152, 155 

 Autotrophs, nitrifiers, 32 

 — , nutrition, 4 

 Auxotroph, definition, 69 

 Azotobacter agilis, a-ketoglutarate, 



63 



, nitrate reduction, 39 



, nitrogen fixation, 47 



Azotobacter chroococcum, 47 

 Azotobacter indicum, 47 



B12 and pseudo-Bi2, 137, 149, 151 

 Bacillus, extracellular peptides, 96 

 — , nitrate reduction, 39 

 — , proteases, 120 

 Bacillus anthracis, peptide cap- 

 sule, 96 



, transforming factors, 134 



Bacillus megatherium, peptidases, 



Bacillus mycoides, deamination, 1 1 

 Bacillus subtilis, asparaginase, 98 



, gelatinase, 1 20-1 



, mutants, 66 



, transamination, 61 



, tryptophan oxidation, 15 



Bacteriophage, synthesis, 140 

 Bacterium cadaveris, anaerobic 



deaminases, 24 

 Barbituric acid, 136 

 Biocytin, 24 

 Biotin, in ammonia assimilation 



by yeast, 25 

 — , in deaminase activation, 24 

 Brucella abortus, transamination, 63 



Calcium, in formation of extra- 

 cellular proteinases, 120 



— , in gelatinase production, 120 



— , in nitrification, 33 



— , in nitrogen-fixation, 47 



Calothrix, nitrogen-fixation, 50 



Carbamylglutamic acid, in citrul- 

 line synthesis, 70 



Carbon monoxide, inhibition of 

 nitrogen-fixation, 52 



Carbon source, 4 



■ , carbon dioxide as, 4 



Carboxypeptidases, 113 



Chloramphenicol (Chloromycetin), 

 152, 155, 156 



Chromatinic bodies, 133 



CitruUine, from arginine, 26 



Citrulline, from ornithine, 69-71 



Clostridium, amino-acid decar- 

 boxylases, 27 



— , nitrogen-fixation, 49 



— , proteases, 116-20 



Clostridium acidi-urici, purine fer- 

 mentations, 136 



Clostridium botulinum, extracellu- 

 lar proteinases, 119 



Clostridium cochlearum, amino- 

 acid fermentations, 22 



Clostridium cylindrosporum, uric 

 acid fermentation, 136 



Clostridium histolyticum, extracel- 

 lular proteinases, 117, 119 



Clostridium kluyveri, acetylation 

 of amino-acids, 104 



Clostridium pasteurianum, isola- 

 tion, 46 



, nitrogen-fixation, 51, 54-5 



Clostridium propionicum, amino- 

 acid fermentations, 21 



Clostridium septicum, arginine di- 

 hydrolase, 26 



, proteinases, 117, 119 



Clostridium sporogenes, arginine 

 dihydrolase, 26 



• , glutamic dehydrogenase, 1 2 



, Stickland reaction, 17 



Clostridium tetani, amino-acid fer- 

 mentations, 22 



, and glutamine, 98 



Clostridium tetanomorphum, amino- 

 acid fermentations, 21 



Clostridium welchii and glutamine, 

 98 



, collagenase (< toxin), 118 



, A toxin, 119 



, nitrate reduction, 39 



Cobalamins, see B12 



Codecarboxylase, see Pyridoxal 

 phosphate 



Coenzyme A, 3, 103-4 



Collagenase, 116 



Corynebacterium, pyrimidine fer- 

 mentations, 136 



Corynebacterium diphtheriae, pep- 

 tides for growth, 102 



Cystathionine, 74 



Cysteine, desulphurase (deami- 

 nase), 23 



— , sulphinic acid, 75 



— , -S-sulphonate, 75 



— , synthesis, 75 



Cytosine, 126 



— , 5-methyl-, 126 



