602 



CHEMISTRY OF THE PROTEIDS 



Physiological considerations : 

 phenyl-alanin, 108, 109 

 rennet, 402 

 sarcosin, 108, 212 

 skatol, 110 



starvation, effect on albumin, 110 

 sulphur, 61, 62 

 . tryptophane, 53, 84 

 urea, 108, 109 

 xanthoprotein, 237 

 Phyto- : 



globulins, 371, 394 

 vitellins, 225, 372, 374, 394 

 Picea-seeds, 72, 283 



Pick's albumoses, 152 ; peptones, 180, 182 

 Picric acid, 15, 38, 125, 243 

 Picrolonic acid, 15, 40, 44 

 Pigments, melanotic, 90 

 Piperidin, 82 



alkali-albuminate, 320 

 Piria's reaction for tyrosin, 50 

 Plants : ammonia, 56 

 casein, 374, 394 

 glue, 376 

 myosin, 372, 374 

 tyrosin, 49 

 Plasma, 378, 382 

 Plasmin, 447 

 Plasminic acid, 426, 447 

 Plasmon, 399 

 Plastein, 183, 191, 192 

 Platinum : 



chloride, 130, 134 

 colloidal, 54 

 salts, 14, 15 



Pluribasic nature of albumins, 218 

 Pluriphasic systems, 306 

 Polyaspartic acid, 115, 143 

 Polypeptids, 131 ; enumeration, 132 ; 

 action of trypsin, 149 ; effect on 

 blood-pressure, 207 ; normal, 194 ; 

 stereo-chemistry, 133 

 Polysaccharids, 160, 161 

 Potash- : 



alum, action on caseinogen, 400 

 salts, precipitating power, 281, 286 

 Potassium : 



bichromate, 86 

 bisulphate, 125 

 chloride, 280 

 ferricyanide, 98 

 ferrocyanide, 125 

 hydrate, 92, 160, 170 

 iodine -iodide for precipitating pep- 

 tones, 179 



permanganate, 170, 237 ; in alkaline 

 solutions, 93, 150; + chromic acid, 

 92 ; + sulphuric acid, 92 

 Potency of ions, 258 



Precipitation, by acids, 14, 16, 69 ; due 

 to removal of salts, 296 ; due 

 to withdrawal of hydrogen or 

 hydroxyl-radicals, 272, 294 

 of colloids, definition, 272 



Precipitation by acids : 



of sodium - globulinate by deutero- 



albumoses, 362 

 tests, 12 



Precipitins, method of action, 383 

 Primary albumoses, 174, 175, 182, 187, 



199, 202 



dissociation - products : classification 

 and enumeration, 27 ; general dis- 

 cussion, 66-69 

 Proferments, 378 



Prolin or a-pyrrolidin-carboxylic acid, 21, 

 25, 32, 45, 46, 65, 68, 87, 102, 

 134, 136 

 peptids, 134, 136 

 Prolyl, 129 



alanin, 135 

 Propanonic acid, 83 

 Propionic acid, 91, 92, 93, 101 

 Propylene-diamin, 124 

 Prosthetic group, 408, 425 

 Protalbinic acid, 317 

 Protalbumose, 74, 149, 151, 172, 179, 180, 



181, 183, 187, 193 

 Protamin, 31, 35, 38, 39, 41, 49, 56, 74, 



154, 168, 206, 448 

 + albumin, 410 

 + primary albumoses, 175 

 as anti-coagulant, 380 

 composition, 65, 66 

 nucleus, 245 

 as precipitant, 14 

 reaction, 224 



Proteids inclusive of albumins : classifica- 

 tion, 4 ; definition, 4 ; occurrence, 3 

 Proteids in the restricted sense : classifica- 

 tion, 349 ; description, 425 

 Protein- : 



cystein, 37 



cystin, 56, 60, 61, 64 

 substanzeu, 4 

 Proteino-chrome, 52 

 Proteolytic ferments, 111, 384 

 Proteoses, 178 

 Proteus vulgaris, 101 

 Prothrombiu, 382 

 Protocatechuic acid, 88 

 Protone, 207 



Prussic acid, 29, 38, 42, 86, 129, 247 

 Pseudo - acid - pseudo - basic state of 

 albumins and. amino- acids, 148, 

 204, 211, 218, 219, 342, 344 

 Pseudo- : 



globulin, 356, 365 

 mucin, 161, 460, 538 

 nuclein, 374, 394, 408 

 pepsin, 189 

 Ptomaines, 167 

 Pulse, 371 

 Purifying albuminous substances, 184, 



185, 186, 350 

 in excess, 351 

 Purin-bases, 426 428, 439 

 Pus, 205 



