TABLE 1.

Corynebacterium diphtheriae strains used in this study

Strain	Genotype	Reference
NCTC13129	Wild type	38
HT1	ΔsrtF	38
HT2	ΔsrtA	38
HT4	ΔsrtD	38
HT6	ΔsrtB	38
HT8	ΔsrtC	38
HT10	ΔspaB	38
HT11	ΔspaA	38
HT12	ΔsrtE	38
HT13	ΔspaC	38
HT14	ΔspaD	This study
HT15	ΔspaF	This study
HT17	ΔsrtBC	This study
HT21	ΔsrtA-F	38
HT22	ΔspaH	This study