X-RAY DIFFRACTION 



specimens of higher orientation. As we have seen, much more certain 

 conclusions can be drawn from such studies. 



Fourier methods have been widely used in the study of single 

 crystals (both protein and nonprotein). There seems to be no good 

 reason why these methods should not yield useful results when applied 

 to fibrous protein. Certainly, many recent experiments have yielded 

 data suitable for such studies. 



When one considers in reti'ospect the considerable effort that 

 has been expended in the study of protein structures with x-rays, per- 

 haps the conclusion is inevitable that the return has been somewhat 

 meager; but at the same time there seems to be considerable justifica- 

 tion for an optimistic view of what is soon to come. The methods and 

 techniques of x-ray diff'raction which are now available should tell us 

 much that we want to know about the structure of proteins. 



References 



(1 



(2 

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 (4 



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(II 

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(16 

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( 



451 



