23034
While molecular determinants of specificity for several headgroups , including phosphatidylserine and phosphoinositides are well defined , specific recognition of the headgroup of the zwitterionic phosphatidylcholine ( PC ) is less well understood .
 Chemical: phosphatidylserine; Chemical: phosphoinositides; Chemical: phosphatidylcholine
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: phosphatidylserine; Chemical: phosphoinositides; Chemical: phosphatidylcholine