164 



NITROGEN METABOLISM 



Pantothenic acid in Co. A, 150 

 Penicillin, 151 



— and amino-acid uptake, 151 

 Penicillium notatum, L-amino acid 



oxidase, 11 



, arginine synthesis, 70 



Pepsin, 113 



Peptidases, activation of, 123 



— , endo-, 113 



— , exo-, 113 



— , intracellular, 114 



— , microbial, 123 



Peptide bond synthesis, 103 



Peptides, as growth factors, 10 1 



— , microbial, composition, 96 



— , source of essential amino 

 acids, 100-3 



— . synthesis, 103 



Phenylalanine and tryptophanase 

 formation, 16 



Phosphate compounds, energy- 

 rich, 2 



— of nucleic acids and protein 



synthesis, 109 



Photosynthetic organisms, nitro- 

 gen-fixation, 50 



Phytotnonas tumifaciens, pepti- 

 dases, 124 



Pichia, differentiation from Han- 

 senula, 43 



Plasmin, 122 



Plasminogen, 122 



Pneumococcus transforming fac- 

 tors, 134 



Polyol phosphates in Staph, aureus, 



Propionibactena, peptidases, 124 



Protein synthesis, 103 



Proteins, decomposition, ii2 



— , microbial, 95 



— , synthesis, 106 



Proteolytic enzymes of bacteria, 



115 



of Clostridia, 116 



of mammals, 113 



of staphylococci, 122 



of streptococci, 122 



Proteus, amino-acid decarboxy- 

 lases, 27 



— , proteases, 120 



— , tryptophanase, 15 



Proteus morganii, glutamine de- 

 composition, 98 



Proteus vulgaris, L-amino-acid oxi- 

 dase, II 



, anaerobic deaminases, 23 



Proteus vulgaris, asparaginase, 98 



, aspartase, 23 



, cysteine desulphurase, 23 



, growth on proteins, 122 



, nitrate reduction, 40 



, nutrition, 4 



, transforming factors, 134 



, transpeptidation reaction, 



100 



Pseudomonas, adaptation, 13 



— , proteases, 120 



— , tryptophan oxidation, 13 



Pseudomonas aeruginosa (Ps. pyo~ 

 cyanea), asparaginase, 

 98 



, peptidases, 124 



, serine and threonine 



deaminase, 23 



, transaminases, 61 



Pseudomonas denitrificans, nitrate 

 reduction, 39 



Pseudomonas fluorescens, aspar- 

 tase, 23 



, a-ketoglutarate, 63 



, nitrate reduction, 39 



, peptidases, 124 



, transaminases, 61 



Pseudomonas stutzeri, nitrate re- 

 duction, 39, 41 



Purines, fermentation, 136 



— , oxidation, 136 



— , synthesis, 137 



Putrefaction, 112 



Putrescine, as growth factor, 29 



Pyrimidines, fermentation, 136 



— , oxidation, 136 



— , synthesis, 138 



Pyridoxal phosphate in amino- 

 acid decarboxylases, 28 



in cysteine desulphurase, 25 



in racemases, 95 



in D and l serine deami- 

 nases, 25 



in transaminases, 61 



in ti-yptophan synthesis, 72 



in tryptophanase, 16 



Pyridoxamine phosphate in trans- 

 amination, 62 



Pyrocatechase in Pseudomonas, 14 



Quinic acid, 5-dehydro-, 73 

 Quinolinic acid, 72 



Reduction of amino-acids, 17 



— of nitrate, 39 



— of nitrite, 40 



