13 



o.-;-0-»-a, 



Protein chemical structure in plan view (above), and in side view (be- 

 low). Black dots represent carbon atoms (and also sulphur atoms in case 

 of sulphur-pep tides), and small circles nitrogen atoms. 



lattice, and will find them to measure approximately 4.5 

 X 10 Angstrom units, which is in perfect agreement with 

 the identity intervals found in X-ray diffraction patterns 

 of natural proteins. 



It will be seen from the diagrams that the protein 

 chemical structure has a polarity somewhat similar to 

 that of a magnet, and may actually consist of a cluster of 

 miniature molecular magnets. Such a structure will be 



