18327
For evaluation of transgene expression in vivo , block / homo polyplex micelles showed 12 - fold higher level in luciferase expression evaluated by bioluminescence imaging system at 24h after the i . p . administration compared with block polyplex micelles composed with only PEG - b - P [ Asp ( DET ) ] in nude mice bearing peritoneal dissemination .
 Chemical: PEG - b - P [ Asp ( DET ) ]
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: PEG - b - P [ Asp ( DET ) ]