9427
The benefits of producing such variants are that they typically express at high levels in Escherichia coli ( 30 - 60mg / L shake flask ) and remain soluble in solution at higher concentrations for longer periods of time than the wild - type form of the domain .
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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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