11644
We compared previously the methylation status between normal liver and liver tumors in SV40 T / t antigen transgenic mice ( MT - D2 mice ) using Restriction Landmark Genomic Scanning for Methylation ( RLGS - M ) and identified several loci / spots that appeared to be methylated frequently in liver tumors .
 SV40 T / t antigen
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: GENE 
Text: {0} 
Answer:
 SV40 T / t antigen