11806
O ( 6 ) - Alkylguanine - DNA alkyltransferase ( AGT ) is a DNA repair protein which removes alkyl groups from the O - 6 position of guanine , thereby providing strong resistance to anticancer agents which alkylate this position .
 Chemical: O ( 6 ) - Alkylguanine; Chemical: guanine
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: O ( 6 ) - Alkylguanine; Chemical: guanine