18669
The pro - apoptotic BCL - 2 family member BOK is widely expressed and resembles the multi - BH domain proteins BAX and BAK based on its amino acid sequence .
 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: amino acid