1260
A method is described for detecting targeted events at the mu heavy chain gene which relies on co - conversion ( or co - exchange ) of a point mutation with a selectable marker contained on a replacement vector .
 GENE: mu heavy chain gene
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: GENE 
Text: {0} 
 Entities: mu heavy chain gene 
Answer:
 GENE: mu heavy chain gene