4191
Keap1 is expressed in differentiating osteoclast - like cells and the S349T mutation selectively impairs the SQSTM1 - Keap1 interaction in co - immunoprecipitations , which molecular modelling indicates results from effects on critical hydrogen bonds required to stabilise the KIR - Keap1 complex .
 Chemical: hydrogen
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: hydrogen