22527
The high sequence similarity of the peptide Delta N 14 - Delta C 89 to RSUs across species hints that this peptide represents the minimum activation motif in RSU and that it regulates all AHASs .
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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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