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Assays with promoter - luciferase fusions established the importance of key residues and that the HRM motif directly impacted the ability of H ( 2 ) O ( 2 ) - responsive promoters to drive gene expression .
 Chemical: H ( 2 ) O ( 2 )
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: H ( 2 ) O ( 2 )