1 66 



NITROGEN METABOLISM 



Transforming factors, 134 

 Transpeptidation, 99, 104 

 Triose phosphate dehydrogenase, 



3» 99 

 Tryptophan and nicotinic acid, 71 



— and Salm. typhosa, 64 



— cycle, 72 



— decomposition by Pseudomo- 



nas spp., 13 



, aromatic pathway, 14 



, quinohne pathway, 14 



— peroxidase in Pseudomonas, 13 



— synthesis, 64, 71 



, inhibitors, 64 



Tryptophanase, 15 

 — , mechanism, 16 

 Tyrosine, decarboxylase, 27 



— , effect on tryptophanase forma- 

 tion, 16 



Ultraviolet light, absorption by 

 purines and pyrimidines, 

 129 



, induction of mutation, 66 



Ultraviolet light, inhibition of 

 adaptation, 107 



, use in photographing chro- 



matograms, 131 

 Uracil, 126 



Ureidosuccinic acid, 139 

 Uridine diphosphate glucose, 127 

 Uridine-5-pyrophosphate pep- 

 tides, 15s 

 Urocanic acid, 21 



Valine and Bacillus anthracis, 65 

 Vibrio, tryptophanase, 15 



Yeast, alcohols from amino-acids, 



22 

 — , aspartase, 23 

 — , glutamine synthesis, 104 

 — , nucleosidase, 136 

 — , purine synthesis, 137 

 — , transaminases, 61 



Zinc, activation of serine deami- 

 nase, 25 



