2682
The salt sensitivity of the interaction indicated that two ion pairs are involved in the association of Zn2 + ( NC - F1 ) with polynucleotide , whereas one ion pair is found in the metal - free peptide - nucleic acid complex .
 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