Guilliermond - Atkinson — 24 — Cytoplasm 



Analysis of original (fresh) material 



Water 82.6% 



Dry material 17.4% 



100.0% 

 Analysis of dry material 



Substances soluble in water 



Protides' 26.5% 



Sugars 14.2 



40.7% 

 Substances insoluble in water 



Protides 



Nucleoproteins 32.3% 



Nucleic acids 2.5 



Albumins 2.2 



Globulins 0.5 



Lipoproteins 4.8 



42.3% 

 Lipides 



Glycerides 6.8% 



Sterols 3.2 



Compound lipides 1.3 



11.3% 



Mineral salts 2.2 



Miscellaneous 3.5 



59.3 



100.0% 



A study of this table admits of the following conclusion: the 

 protoplasm of the Plasmodium of Fuligo is composed essentially of 

 proteins in the proportion of 68.8% (including the lipoproteins) and 

 of lipides in the proportion of 15% (including the lipoproteins) 

 and in addition, sugars (14.2%) and mineral salts (2.2%). 



The chemical constituents of cytoplasm. Protides^:- The pro- 

 tides comprise the proteins and their hydrolysis products, the 

 amino acids. The protides are the essential constituents of cyto- 

 plasm and are, as is known, the most complicated of organic com- 

 pounds. Their molecules are the largest. These proteins charac- 

 terize living matter which alone has the power to create them. 



Proteins are classified in two groups according to their chem- 

 ical constitution and some of their properties : the holoproteins^ and 

 the heteroproteins^. The holoproteins are made up only of amino 



' Cf. Footnote'. 



* Translator's note. Protide is a more comprehensive term than any used in the classifica- 

 tion recommended by the Physiological and Biochemical Committees on Protein Nomenclature, 

 J. Biol. Chem. 4:XLVIII-LI (1908) and refers to proteins and their hydrolysis products, 

 amino acids, amines, amides, soluble proteins, etc. 



» Translator's note. Simple proteins. The term protein is more generally used by 

 American chemists today than proteid and will be adopted here in translation of proteide in 

 the French text. 



* Translator's note. Conjugated proteins. 



