2164
Modeling also revealed a very hydrophobic surface due to the absence of H12 , exposing residues from H3 , loop 3 - 4 , H4 , and H11 .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: GENE 
Text: {0} 
Answer:
 None