478 PHYSIOLOGY. 



The body can only store proteid when the substances ingested 

 are reinforced by substantial additions of carbohydrates and fats. 



In order to obtain the greatest total deposit of. proteid in the body 

 it is best to give a relatively large quantity of fat in comparison to the 

 quantity of meat. The carbohydrates have the same relation to the 

 storing of proteid as the fat, and in a much greater degree. All this 

 proves that in recovering from a wasting fever you must use, with 

 proteid, carbohydrates and fats. 



Nucleo-proteids, When the nucleo-proteids enter the intestine 

 the nuclein undergoes hydrolysis by the proteolytic agents, and the now 

 soluble nuclein enters the blood. The intracellular ferment, nuclease, 

 in the tissues breaks up the nuclein in the manner shown in the follow- 

 ing table from Yon Noorden. 



Nucleo-proteins 



A 



v Albumin Nuclein 



A 



Albumin Nucleic acids 



iin ^ 

 lin I 

 tin I 

 lin / 



Carbohydrates Phosphoric 

 i 



acids Bases 



Peiitoses Adenin 



Hexoses Guanin I Purin 



non-reducing Hypoxanthii 



leading to Xanthin 



levulinic 



acid Thymin 



Cytosin > midin 

 Uracil ) bodies 



The relations between the purin bodies are shown in the following 

 summary : 



Purin = C 5 H 4 N 4 



Amino- r Adenin = C 5 H 6 N 3 = 6-amino-purin 



purin \ Guanin = C 5 H B N 5 = 2-amino 6-oxypurin 



Q f Hypoxanthin = C 5 H 4 N 4 = 6-oxypurin 



\ Xanthin = C 8 H 4 N 4 O 2 = 2.6-oxypurin 



purin Uric acid = C 5 H 4 N 4 O 3 = 2.6. 8-trioxy purin 



The purin base guanin by guanase is converted into xanthin, and 

 the base adenin by adenase into hypoxanthin. The xanthin oxidase by 

 oxidation converts hypoxanthin and xanthin into uric acid. Hypoxan- 



