394 



UNITY AND DIVERSITY IN BIOCHEMISTRY 



degradation 221, 224 

 Propionyl-CoA 217, 224 

 Protamine 96, 111 



Proteins 83, 93-104, 123, 124, 172, 

 263-269, 336 



amino acid incorporation 267 



composition 100, 103, 105 



denaturation 98, 100 



fibrous 94 



globular 96, 97 



hydrolysate, analysis 103 



macromolecules 301-303 



metabolism 309 



reactive groups 101 



residual 111 



structure analysis 93-102 



synthesis 263-269 



titration 100 

 Protium 183 

 Protohsm 113, 293 

 Protons, see also Transhydrogenases 



174, 183, 207 

 Protoplasm 274 

 Protoporphyrin 45, 46, 117, 291 

 Protopteriis 337 

 PRPP. see Phosphoribosylpyrophos- 



phate 

 L-Psicose 16 



Pteridine derivatives 55-56 

 Pterins 55 

 Pteroic acid 56 



Pteroyl glutamic acid, see Folic acid 

 Purine 53, 107, 221, 267 



derivatives 53 



nucleotides 255, 258 



ring 240, 255 

 Putrefaction 46 

 Putrescine 210 

 Pyran 47, 48 

 Pyranose 19 

 Pyrazine 52 

 Pyridazine 52 

 Pyridine 51, 71 

 Pyridoxal 52, 242 



-5 -phosphate 66, 174, 220 

 Pyridoxamine 52 



-5-phosphate 66 

 Pyridoxine 52 

 Pyrimidine 52, 55, 107, 221, 241, 268 



derivatives 52-54 



nucleotides 255, 258 



ring 241, 255 



Pyrophosphatases 137, 156 



Pyrophosphates 137, 161, 235 

 bonds 179 



Pyrrole derivatives 43 



Pyrrolidine 46, 72 



id'-Pyrroline-5-carboxylic acid 244 



Pyruvic acid 13, 137, 141, 143, 159, 

 163, 190, 194, 196, 212, 221, 222, 

 224, 226, 228, 229, 230, 231, 247, 

 262, 267, 269, 280, 355 

 oxidative decarboxylation 196, 203 



Pyruvic carboxylase 165 



Pyruvic decarboxylase 196 



Pyruvic phosphokinase 144 



Q-enzyme 263 

 Quercetin 49 

 Quercitrine 50 

 Quinic acid 249 

 Quinolinic acid 220 



Racemases 166 

 Rackers reaction 357, 358 

 Raia ocellata 296, 299, 318, 321 

 Reaction chains, enzymic 282-285 

 Reactions, priming 186-228 



biosphere 179-228 



endothermic and exothermic 131, 

 132 



exergonic 136 



metabolic 144, 182, 309, 349-365, 

 377-379 



oxidation-reduction 142, 144, 145 



reversible 147-149 

 Redox potential 140 

 Regulation, cellular 282-286 

 Reptiles 318, 319, 329, 330, 337, 339, 



340, 341 

 Resins 289 

 Respiration 144, 199 

 Respiratory chains 207, 208, 209 

 Respiratory cycles 317-322 

 Retinene 290, 343 

 Rhamnose 23 

 Rhizobium 363, 364 

 Rhizopus tritici 368 

 Rhodopsin 290, 337, 343 

 Rhodoviolascin 33 

 Rhodoxanthin 36, 37 

 Ribitol 23, 58 



phosphate 66 

 Riboflavin 59, 259 



