24044
Selection against Ni ( 2 + ) - nitrilotriacetic acid ( NTA ) enriched for sequences containing histidine and BpyAla .
 Chemical: Ni ( 2 + ); Chemical: nitrilotriacetic acid; Chemical: NTA; Chemical: histidine; Chemical: BpyAla
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: Ni ( 2 + ); Chemical: nitrilotriacetic acid; Chemical: NTA; Chemical: histidine; Chemical: BpyAla