NON-DISSOCIABLE INORGANIC RADICAL 



175 



Salt 



Sodium casemate (80X10~^ equivs. 



per gram) 



Ammonium caseinate (80X10~^ 



equivs. per gram) 



Potassium caseinate (80X10~^ 



equivs. per gram) 



Calcium caseinate (80X10~^ equivs. 



per gram) 



Strontium caseinate (80X10~^ 



equivs. per gram) 



Barium caseinate (80X10~* equivs. 



• per gram) 



Potassium serum-globulinate 



(20X10~* equivs. per gram) 



Calcium serum-globulinate 



(20X10~* equivs. per gram) 



Strontium serum-globulinate 



(20X10~^ equivs. per gram) 



Barium serum-globulinate 



(20X10~* equivs. per gram) 



Ovomucoid chloride (45X10~^ 



equivs. per gram) 



Temp., 



Degrees 



C. 



25 

 25 

 30 

 30 

 30 

 30 

 30 

 30 

 30 

 30 

 30 



Equivalent con- 

 ductivity at in- 

 finite dilution, 

 equivalent cone, 

 taken as that of the 

 inorganic radical. 

 Reciprocal ohms 

 per cc. per equiva- 

 lent per litre 



63.5X10-3 

 79.4X10-3 

 80.6X10-3 

 35.9X10-3 

 30.7X10-3 

 42.1X10-3 

 51.0X10-3 

 23.5X10-3 

 27.5X10-3 

 23.4X10-3 

 196.0X10-3 



Equivalent con- 

 ductivity at in- 

 finite dilution of 

 the inorganic radi- 

 cal. Reciprocal 

 ohms per cc. per 

 equivalent per 

 litre 



50.6X10-3 



73.2X10-3 



81.0X10-3 



65.7X10-3 



67.0X10-3 



71.1X10-3 



81.0X10-3 



65.7X10-3 



67.x 10-3 



71.1X10-3 



81.7X10-3 



It is evident that in many cases the equivalent conductivity 

 of a protein salt is actually less, in the salts of the alkaline earths 

 very considerably less than that of its inorganic radical alone. 

 On the supposition that the protein salt splits off the inorganic 

 radical as an ion, not only the inorganic radical but also the 

 protein must be participating in the conduction of electricity 

 through its solution, and its equivalent conductivity, when com- 

 pletely dissociated, must be greater than that of the inorganic 

 radical by the amount contributed by the protein ion. Hence 

 the assumption that the salts of the proteins split off the inorganic 

 radical as an ion must be incorrect. 



We have seen, in considering the constitution of the protein 

 molecule (Chap. I), that the protein molecule does not contain 

 a suflScient number of terminal — NH2 and — COOH groups to 

 account for its high combining capacity for acids and bases, and 

 the suggestion was put forward that the true point of union with 

 acids and bases is the — N.HOC— group, and that union with 



