26547
Expression of a gene encoding homogentisate geranylgeranyltransferase ( HGGT , which has long been believed to be important for T3 production ) differed significantly between grain and flag leaf .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
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