42 Can Science Explain Life? 



combinations of right-handed and left-handed 

 •spirazines should have occurred frequently, and 

 the number of optically right-handed combina- 

 tions should have been about equal to the number 

 of optically left-handed combinations. However, 

 since nearly all proteins are left-handed, it must 

 be concluded that the evolutionary development 

 of protoplasmic structures could not have taken 

 place by random polymerization but was probably 

 brought about by some sort of folding over 

 process. 



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