1578
One RNA construct which consisted of 112 nucleotides ( nt ) from nt 639 to nt 750 formed a heterodimeric complex with the RNA which consisted of 200 nucleotides from nt 551 to nt 750 .
 None
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: GENE 
Text: {0} 
Answer:
 None