18054
Consequently , the phosphorylation of ATR and ATM substrates , Chk1 , Chk2 , H2AX , and BRCA1 was significantly reduced or abrogated in mutant cells .
 None
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities:  
Answer:
 None