12752
We identified a putative catalytic residue within a highly conserved region of RbgA , His9 , which is contained within a similar PGH motif found in elongation factor Tu ( EF - Tu ) that is required for GTP hydrolysis on interaction with the ribosome .
 Chemical: GTP
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: GTP