26550
No increase in grain T3 from the middle to late stages of maturation and a decrease in T3 precursors during maturation suggest that HGGT would be an essential , but not limiting factor for T3 biosynthesis , and T3 precursors could regulate the T3 level in grain .
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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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