6172
In this work we describe the expression of the protein in presence of different metals showing Mn ( 2 + ) to support the higher activity .
 Chemical: Mn ( 2 + )
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: Mn ( 2 + ) 
Answer:
 Chemical: Mn ( 2 + )