THE PROPERTIES OF PROTEINS 



Table 7. 

 Maxima of Precipitation. 



* Biochem. Zeitsch., 1910, 28, 193. 

 f Biochem. Zeitsch., 1912, 47, 260. 



The iso-electric point for hydrated natural proteins like 

 albumin and glutin can be found by a greater variety of methods 

 depending on the properties of the neutral particles. 



The simplest of these is the method of precipitation by 

 alcohol, as worked out by Pauli in conjunction with J. Matula 

 and M. Samec. By suitable alteration of the protein concen- 

 tration and of the quantity of alcohol added, an extremely 

 sharp location of the maximum of precipitation is possible. 



The following table gives examples from such investigations * 



Table ya. 

 Ox-serum Albumin. 



(1-8 c.c. alcohol to 3 c.c. mixture.} 



* Unpublished results of Pauli and Samec, 1912-13. 



