10350
Cytotoxic 1 - methyladenine ( 1 - meA ) and 3 - methylcytosine ( 3 - meC ) lesions induced in DNA and RNA in vitro and in pre - damaged DNA and RNA bacteriophages in vivo are repaired by the Escherichia coli ( E . coli ) protein AlkB and a human homolog , ALKBH3 .
 1 - methyladenine, 1 - meA, 3 - methylcytosine, 3 - meC
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 1 - methyladenine, 1 - meA, 3 - methylcytosine, 3 - meC