19397
In our effort to elucidate the quenching mechanism , we studied a total of eight AgNCs prepared by different hairpin DNA sequences ; they showed different sensitivity to Hg ( 2 + ) , and DNA with a larger cytosine loop size produced more sensitive AgNCs .
 Chemical: Hg ( 2 + ); Chemical: cytosine
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: Hg ( 2 + ); Chemical: cytosine