2570
The resulting DNA migration trails were obtained using fluorescent microscopy at 400 x magnification , and graded according to the mutagenicity index ( MI ) for each cell incubation condition .
 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