Table 1. Bacterial strains and plasmids used in this study.

Bacterial strains	Characteristics*	Reference
S. agalactiae 874391	Wild-type, sequence type 17, serotype III strain	[37,38]
S. agalactiaeGU2852	S. agalactiae 874391 overexpressing GAPDH (carrying pDL278::gapC); SpR	[20]
S. agalactiaeGU2672	S. agalactiae 874391 carrying pDL278 (empty vector control strain); SpR	[20]
S. agalactiae GU3055	874391Δstp1 (stp1 mutant)Locus tag: CHF17_00435	[30]
S. agalactiae GU3126	874391Δstp1 pGU3119 (pDL278::stp1/k1)	[30]
S. agalactiae GU2400	874391ΔcovR (covR mutant); CmRLocus tag: CHF17_01656	[28]
Plasmids
pDL278	Shuttle vector for complement studies; SpR	[39]
pGU3119	pDL278::stp1/k1 complement construct, SpR	[30]

*SpR, spectinomycin-resistant; CmR, chloramphenicol resistant; Ts, temperature-sensitive.