10787
Recent research has shown that heme binds preferentially to the His ( 13 ) residue of A beta with the iron center , while the hydrophobic domain of A beta is also able to bind to heme .
 Chemical: heme; Chemical: His; Chemical: iron; Chemical: heme
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: heme; Chemical: His; Chemical: iron; Chemical: heme