8497
Influence of developmental lead exposure on expression of DNA methyltransferases and methyl cytosine - binding proteins in hippocampus .
 Chemical: methyl cytosine
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: methyl cytosine 
Answer:
 Chemical: methyl cytosine