5370
The optimal molecular weight and concentration of PLL in drug - delivering liposomes were 15 , 000 - 30 , 000 and 0 . 005 % , respectively .
 Chemical: PLL
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: PLL