TABLE 3.

Primers used in this study^a

Primer	Sequence (5′–3′)
rtx 5′ For	GCAGGAATTCAATCTTGCGAATTTGGTGTG
rtx 5′ Rev	GCACGGATCCTCGGGCTGATAAATGCCGAC
rtx 3′ For	GCACGGATCCAGCTGAACAACGATTCAATG
rtx 3′ Rev	GCAGAAGCTTAGAGCTGCGCGTAACCTATG

^aAll primers were developed in the course of the present study.