843
The pathological significance of the point mutations G197W , W427R , and the in - frame deletion 390delGly were assessed by their respective expression in a prokaryotic system using site - directed mutagenesis .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Disease 
Text: {0} 
Answer:
 None