Table 2 Plasmids used in this study

M-001

INPN-MerR

B-001

INPN-ChrB

M-002

FL-MerR

B-002

FL-ChrB

M-003

HL-MerR

B-003

HL-ChrB

M-004

RL-MerR

B-004

RL-ChrB

M-005

96 bp-MerR

B-005

96 bp-ChrB

M’-001

INPN-MerR_opt

B’-001

INPN-ChrB_opt

M’-002

FL-MerR_opt

B’-002

FL-ChrB_opt

M’-003

HL-MerR_opt

B’-003

HL-ChrB_opt

M’-004

RL- MerR_opt

B’-004

RL- ChrB_opt

M’-005

96 bp- MerR_opt

B’-005

96 bp- ChrB_opt

M-006

E-MerR-H

B-008

B-ChrB-E

M’-006

E -MerR_opt-H

B’-008

B- ChrB_opt-E