21734
GGT was stable at pH 8 . 0 - 10 . 0 with an optimum pH of 8 . 8 , and was stable at 20 - 50 degrees C with an optimum activity at 37 degrees C .
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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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