Table 1. PCR primers used in this study.

Primer	Sequence (5′→3′)	Comments
PAO102_F*	AGAGAGCATATGCCAGACCGTATG	External psCA1 primer, forward
PAO102_R	AGAGAGGGATCCTCACGAGCTCAG	External psCA1 primer, reverse
PA2053_F	AGAGAGCATATGCGTGACATCATCG	External psCA2 primer, forward
PA2053_R	AGAGAGGGATCCTCAGGCGAC	External psCA2 primer, reverse
PA4676_F	AGAGAGCATATGAGCGACTTGCAG	External psCA3 primer, forward
PA4676_R	AGAGAGGGATCCTCAGCAGCAAC	External psCA3 primer, reverse

^*The forward and the reverse primers include the recognition sites for NdeI and BamHI (underlined). Six bases (AGAGAG) were added to the start of each primer.