Subject Index 



387 



Triphosphopyridine nucleotide, 



in the regulation of glycolysis, 230- 



255 

 in regulation of glycolysis, effect 



of impurities, 240-242 

 in the regulation of glycolysis, 

 effect of mitochondria, 233-236, 

 238-240 

 reoxidation of, in carbohydrate 



metabolism, 159-164 

 reoxidation of in pentose phos- 

 phate cycle, 285-286, 290, 292 

 Triphosphopyridine nucleotide- 

 cytochrome c reductase, activity 

 of, 27-28, 45 

 Triphosphopyridine nucleotide- 

 lactic dehydrogenase, in glyco- 

 lysis, 244^245 

 Trypsinogen, in ribonucleoprotein 



particles, 41 

 Tryptophan, in bacteria, 299 



Uncoupling agent, calcium as, 



103-106, 127, 128 

 control of cell respiration by, 71-74 

 effect on cell respiration, 107-112 

 effect on electron pathways, 199, 



200 

 effect on vitamin K, 195, 199, 200, 



201 

 "loose" and "tight", 143, 145 

 naturally occurring, 138-144, 146 

 separated from mitochondria, 140, 



146 

 sequence of reactions of, 130-133, 



146 

 site of action of, 133-138 

 stimulation of cell respiration by, 



62-63 

 Uridine diphosphate glucose, in 



glycogen synthesis, 192 

 Uridine triphosphate, in carbo- 

 hydrate metabolism, 154-155 



Valine, in bacteria, 300, 305 

 Vitamin E, in cell respiration, 81 

 Vitamin K, in oxidative phosphoryl- 

 ation, 196-197, 200, 201, 203 



role of in electron transport, 194 

 Vitamin K reductase, 195, 203 



compared with cytochrome c re- 

 ductase, 195 



inhibited by dicoumarol, 195, 201 



properties of, 195-196 



substances inhibiting, 195 



Xanthosine 5'-phosphate, 306, 

 307 



Xylulose, in carbohydrate meta- 

 bolism, 154, 155, 184 



Xylulose -5 -phosphate, in carbo- 

 hydrate metabolism, 155, 159 



Yeast cells, adenosine diphosphate 

 in, 117, 128 



adenosine triphosphate in, 128 



effect of cyanide on cell respiration 

 in, 266-268 



enzymic regulation of fermentation 

 in, 277-294 



fermentation in, effect of ammon- 

 ium ions, 283-285, 290, 292, 293, 

 294 



fructose diphosphate concentra- 

 tion in, 277-282 



glucose-oxidizing cells of, effect of 

 ammonium ions on, 283-285, 

 290, 292 



growth of, 293 



hexose phosphate content of, 260 



orthophosphate content of, 258, 

 260 



pyridine nucleotide kinetics in cells, 

 288-292 



reduction of pyridine nucleotide in, 

 116, 117-119, 122 



