266 LOCALIZATION OF RADIATION EFFECTS 



Muller: 



Is there any reason to believe that 1 in 11 represents the chance that inacti- 

 vation will result from the conversion of any P atom in the nucleoprotein to S, 

 rather than the proportion of P atoms in the nucleoprotein which are so situated 

 that inactivation will inevitably result from their conversion to S? 



Kamen: 



It is not known whether 8 per cent of the phosphorus is in the right portion 

 of the molecule and will have 100 per cent probability of inactivation following 

 disintegration of the P^^, or whether distribution of the energy throughout the 

 molecule will give rupture at the appropriate bond in 12 per cent of the cases. 



