8883
The measured dissociation constant and Hill coefficient are K ( d ) = 83 +/- 3 nM and n = 3 . 1 +/- 0 . 3 , respectively which is indicative of multi - ligand binding and cooperativity similar to that of unconjugated serotonin .
 None
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 None