THE PITUITARY GROWTH HORMONE 



369 



TABLE III 



Effect of Growth Hormone (in vitro) on FFA Release by 

 Adipose Tissue of Normal Male Rats 



TABLE IV 



Effect of Corticotropin (m vitro) on FFA Release by 

 Adipose Tissue of Normal Male Rats 



of growth hormone, for in the same system as little as 0.005 microgram 

 per ml. of corticotropin significantly increases FFA release (Table IV). 

 Similar observations with even lower concentrations of corticotropin 

 have been made by others ( Hollenberg, Raben, and Astwood, 1960 ) . It 

 can readily be seen, therefore, that contamination of the growth- 

 hormone preparation with corticotropin to the extent of less than 0.1 



