974
The NarX and NarQ proteins with amino acid substitutions at the first conserved histidine position were also unable to dephosphorylate NarL - phosphate in vitro .
 GENE: NarX; GENE: NarQ proteins; GENE: NarL
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: GENE 
Text: {0} 
Answer:
 GENE: NarX; GENE: NarQ proteins; GENE: NarL