22526
The ability of this peptide to activate different CSUs does not correlate well with its binding ability ( Kd ) to these CSUs , thus implying that key interactions by specific residues is more important than binding ability in promoting enzymatic reactions .
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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:
 None