6674
DNA methylation , especially of either one or both of the deoxyadenosines at the two GATC motifs ( one in the first exon and the other in the first intron of the rice CatA gene ) , appeared to be responsible for the CatA promoter activity identified in the transient assay .
 CatA gene, CatA promoter
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: GENE 
Text: {0} 
Answer:
 CatA gene, CatA promoter