Table 2.

Plasmids used and menaquinone expression plasmid constructs for two Lactobacillus strains.

Plasmids	Relevant Features	References
pSIP409gusA	spp-based expression vector, PSIP401 derivative, gusA controlled by PsppQ(PorfX), sppKR expression driven by eryB read through	[25]
pSIP409∆BsaI	ery, PSIP401 derivative with removal of BsaI restriction site	This study
pSIP_lpMK_2	ery, PSIP401∆BsaI derivative, menaquinone biosynthesis genes for Lactipl. plantarum controlled by two PsppQ	This study
pSIP_lpMK_1	ery, PSIP401∆BsaI derivative, menaquinone biosynthesis genes for Lactipl. plantarum controlled by one PsppQ	This study