Table 2. Primers used for quantifying the level of transcripts in Quantitative PCR.

Gene	Primer	Sequence
lacZ	Forward primer	5_-CCTATCCCATTACGGTCAAT _-3
	Reverse primer	5_-CGTTGCACCACAGATGAAA_ -3
cat	Forward primer	5_AAGACGGTGAGCTGGTGAT_-3
	Reverse primer	5_TGCGAATATATGTGTAGAAACTG_-3