6548
For this purpose , sulfonate , carboxylate , and hydroxyl groups were incorporated on self - assembled peptide nanofibers .
 Chemical: sulfonate; Chemical: carboxylate; Chemical: hydroxyl
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: sulfonate; Chemical: carboxylate; Chemical: hydroxyl