19644
The experimental results confirm that the previously identified NEMO binding domain ( NBD ) region of IKK beta contains the highest concentration of hot - spot residues , the strongest of which are W739 , W741 , and L742 ( Delta Delta G = 4 . 3 , 3 . 5 , and 3 . 2 kcal / mol , respectively ) .
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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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