Table 9.— Variability of agglutination strength of various reagents 

 with respect to storage age of red cells 



Sugars have been tested for their ability to 

 inhibit a portion of the reactions of certain 

 extracts in attempts to increase the specific- 

 ities (Morgan and Watkins, 1953). A saline 

 solution of L-arabinose (10 percent) has 

 shown marked inhibition of Robinia luxurians 

 bark extract at higher titers when 

 tested against chinook salmon erythrocytes. 

 There is no conclusive evidence of an 

 increase in specificity associated with 

 the use of this sugar in the above reac- 

 tion. 



PRELIMINARY STUDIES OF 

 PHYTOPRECIPITINS 



The general necessity for fresh material 

 in the study of erythrocyte antigens has led 

 to a search for variation in serum antigens. 

 Using the double diffusion technique of 

 Ouchterlony and immune antisera we have 

 been studying the variation of serum antigens 

 within and between the five species of Pacific 

 salmon indigenous to North America (Ridgway, 

 Klontz, and Matsumoto, 1962). 



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