17984
An arginine - leucine block copolypeptide ( R60 L20 ) is synthesized , which is capable of forming vesicles with controllable sizes , able to transport hydrophilic cargo across the cell membrane , and exhibit relatively low cytotoxicity .
 Chemical: arginine; Chemical: leucine
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: arginine; Chemical: leucine