27906
The recombinant C - terminal fragment of AFP ( AFP - 3BC , which consists of amino acid residues 473 - 596 ) was obtained by the expression in Escherichia coli .
 Chemical: C; 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: C; Chemical: amino acid