23036
In PC , this moiety might provide a sufficient handle to bind to peripheral proteins via a cation - pi cage , where the pi systems of two or more aromatic residues are within 4 - 5 A of the quaternary amine .
 Chemical: quaternary amine
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: quaternary amine