19993
A qualitative explanation for the anomalously high value of mu of native heparin , 10 - 20 % higher than those seen for synthetic polyelectrolytes of higher linear charge density , is suggested on the basis of similar junction effects ( Manning , G . S . Macromolecules2008 , 41 , 6217 - 6227 ) , which reduce counterion condensation at the interfaces of regions of high and low sulfation .
 None
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities:  
Answer:
 None