740 



SUBJECT INDEX 



N 

 "Nitrite body," 119 

 Nitrogen fixation 



hemoglol)in in, 449 



hydrogenase in, 448 

 Nitrophenols 



effect on cytochrome system, 376 



inhibition of cytochrome reductase, 522 



O 



Oocyan. See Biliverdin. 



Ooporphyrin, 50 (table), 60. See also 



Protoporphyrin . 

 Oxidases. See Cytochrome oxidase, Cyio- 

 chromen ai, Ui, a.„ Hematin compounds, 

 Hemafin, Hemochromes, Hemoglobin, 

 Respiratory ferment. 

 distinction from peroxidases, 342, 431, 

 432 

 Oxidation-reduction potentials, 28 ff., 

 193 ff. 

 effect of change in aggregation on, 35 

 effect of combination of oxidant or 

 reductant with other substances, 

 36 

 effect of pU on, 32, 197 

 of hematin systems, 193 ff. 

 of hemochrome systems, 194 ff. 

 interaction between systems, 44 

 of Mn and Co porphyrins, 192, 193 

 (table) 

 Oxorhodin, 134. See also Bilieyth- 

 rinoid oxidation products of bila- 

 trienes. 

 Oxourobilin, 134 



Oxyhemoglobin, 214. See also Erythro- 

 criiorins. Hemoglobin, Myohemo- 

 globin. 

 absorption .spectrum, 226, 228 (table) 

 in infrared, 226, 289 

 effect of protein on, 310 

 active oxygen from, 257, 395 

 bond type, 214 

 and cephalin, 258 

 cry.stals, 212, 248, 251 

 denaturation, 257 



dissociation and association equilibria, 

 207, 260-269, 305 

 effect, of CO on, 271 



of erythrocyte substances on, 323, 



329 

 of hemoglobin on, 273 

 of pH on, 275 



Oxyhemoglobin (cnntd.) 



of temperature on absorption band 

 position, 290 

 equation, of Adair, 263 

 of Hill, 262, 280, 281 

 of Hiifner, 262, 268, 280, 285 

 of Pauling, 265 

 functional importance of sigmoid curve, 



.326, 327 

 methods of investigation, 260 

 electrometric titration, dissociation 

 constants, 233, 237 (table), 276 

 differential between oxyhemoglobin 

 and hemoglobin, 236 

 kinetics, of association and dissociation, 

 279, 287 (table) 

 of reaction with CO, 282 



anomaly in pH sensitivity, 283, 

 287 

 linkage, imidazole-iron, 233 ff. 

 of oxygen, 231, 289 



heats and entropies, 288 

 loading and unloading tension, 324, 



327, 329, 332, 333 (tab-.e) 

 preparation, 211 

 purity, criteria of, 213 

 zinc salt, 253 

 Oxyporphyrins, 91 



Oxyporphyrin hemochromes, 201, 203, 

 366 

 transformation into verdohemo- 

 chromes, 203, 458, 461, 468 



Parahematins. See Hem'ichromes. 

 Partition constants (CO/O,) 



of cytochrome oxidase, 366, 380 



of hemoglobin, 262, 271, 283, 287 

 (table), .306 



of myohemoglobin, 285, 287 (table), 

 306 



relation to "span," 289, 310 



of respiratory ferment, 363 

 Pasteur enzyme, 371 

 Pentdyopent, 150, 559 



mode of formation, 500 

 Peroxida.se, 401, 419 



of adrenal medulla, 359, 430 



anal)olisni, 627 



in animals, 435 



biological function, 434 



and catalase, competition between, 422 



catalatic action of, 445 



