BLOOD 



protein, which result in rouleaux formation. Beneficial effects 

 of certain plasma proteins upon the red cell during preservation 

 have also been recorded in the literature. In addition to the 

 strong orienting forces at the surface of cells which favor selected 

 protein atmospheres, there are ample forces within the fluid 

 phase itself capable of effecting orientation of proteins with re- 

 spect to each other. These consist of the same kinds of forces 

 upon which many of the physiological interactions of the blood 

 depend. Tempting though it may be to postulate in this direc- 

 tion, the present status of our knowledge is clearly only sufficient 

 to allow for intelligent surmise. 



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