88 



.SPIRAL TWIST AND OPT. ACTIVITY 



Lewis' reaction might be considered as a fermentative 

 deficiency of the dextral strain. 



(7. G r o w t h on two optical isomers. It 

 is of interest to know how an organism which presents a 

 morphologically dissymmetric structure (right or left 

 spiral) behaves when grown on a medium which is molec- 

 ularly diss^anmetric. The dextral and sinistral strains 

 of Bacillus mycoides were growm on the optical isomers 

 of arginine (Gause, 1939). The results are summarized 

 in Tables 16 and 17. 



A safe conclusion that one can draw from these data is 

 that both the dextral and the sinistral strains of Bacillus 

 mycoides, in both the rough and the smooth forms, grow 



TABLE 16 



Growth of Sinistral (LR) and of Dextkal (DR) Forms of Bacillus 

 Mycoides on Optical Isomers of Arginine 



TABLE 17 



Growth of Smooth Sinistral (LS) anu of Smooth Dextral (DS) 

 Forms of Bacillus Mycoides on Optical Isomers of Arginine 



