K - Minimum Essential Medium Eagle in Earle's BSS with 15% FBS 

 not inactivated (with 2x concentration of essential and 

 non-essential amino acids and vitamins) 



L - Minimum Essential Medium Eagle in Earle's BSS with 12% FBS 

 not inactivated (with 2x concentration of essential and 

 non-essential amino acids and vitamins) 



M - Roswell Park Memorial Institute 1640 with 30% FBS inactivated 

 60°C for 1/2 hour 



N - Minimum Essential Medium Eagle in Earle's BSS with 10% FBS 

 inactivated 60°C for 1/2 hour (with 2x concentration of 

 essential and nonessential amino acids and vitamins) 



- Roswell Park Memorial Institute 1640 with 30% FBS not inac- 

 tivated 



P - Ham F12 with 10% FBS inactivated 60°C for 1/2 hour 



Q - Ham F12 with 20% FBS inactivated 60° C for 1/2 hour 



R - Minimum Essential Medium Eagle in Earle's BSS with 5% FBS 



not inactivated (with 2x concentration of essential and non- 

 essential amino acids and vitamins) 



S - Minimum Essential Medium in Hanks' BSS with 10% FBS not 

 inactivated (with 2x concentration of essential and non- 

 essential amino acids and vitamins) 



T - Minimum Essential Medium in Hanks' BSS with 20% FBS not 

 inactivated (with 2x concentration of essential and non- 

 essential amino acids and vitamins) 



U - Ham F12 with 30% FBS not inactivated 



132 



