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Mutational analysis of mRNA capping enzyme identifies amino acids involved in GTP binding , enzyme - guanylate formation , and GMP transfer to RNA .
 GENE: mRNA capping enzyme
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: mRNA capping enzyme