20479
The stacking interactions are parametrized using a set of nucleotide - specific parameters , which were calibrated against the thermodynamic measurements for single - base stacks and base - pair stacks .
 Chemical: nucleotide
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: nucleotide