10230
This design was based on the X - ray co - crystal structure of four N - terminal amino acid residues ( AVPI ) of the second mitochondria - derived activator of caspase ( Smac ) with the X - chromosome - linked IAP ( XIAP ) protein .
 Chemical: N; Chemical: amino acid
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: N; Chemical: amino acid