2766
The nucleotide sequence of the region upstream from M . voltae ORFtrpA was determined and revealed the presence of an ORF of 1227 nucleotides ( ORFtrpB ) encoding a 409 amino acid polypeptide of mol . wt .
 M . voltae ORFtrpA, ORFtrpB
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: GENE 
Text: {0} 
Answer:
 M . voltae ORFtrpA, ORFtrpB