12 Variations in Bacteria Caused by Change of Medium 



Differences in quantity of coagulable protein show that the bacterial 

 protein is, in many instances, itself different. This is supported by the 

 fact that the ratio of nitrogen to any one of the protein fractions, or 

 to all of them combined, is not constant. Also, it can be seen that the 

 presence of certain substances in the environment, particularly fats, 

 alters the chemical constitution of the organism. 



TABLE IV 



Summary of results obtained by use of different 

 media in the cultivation of B. Coli 



* Not determined because of extraneous fat attached to bacteria. 



