7857
Indeed the predicted folding of the 5 ' and 3 ' - untranslated regions revealed patterns of stem and loop structures conserved for all tick - borne flaviviruses suggesting a purifying selection for preservation of essential RNA secondary structures which could be involved in translational control and replication .
 None
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: GENE 
Text: {0} 
 Entities:  
Answer:
 None