2046
A simple model of the influence of pH on the phosphatidylethanolamine monolayer at the air / hydrophobic chains of PE is presented .
 Chemical: phosphatidylethanolamine
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: phosphatidylethanolamine