688
Exposure of normal human cells to gamma - irradiation and the radiomimetic drug neocarzinostatin had no effect on ATM protein levels , in contrast to a noted rise in p53 levels over the same time interval .
 None
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Disease 
Text: {0} 
Answer:
 None