TABLE 1.

Primer sequences.

Primers	Forward sequence	Reverse sequence
PKR1	5′-GGCTTCCAGACAGAGCAG ATC-3′	5′-GACAGTCACAAAGCAGA GCGTA-3′
PKR2	5′-CTACTTCCTCTTCGTCTT CGGG-3′	5′-AGAAGTCTCGCACTATGG TAAAGC-3′