Table S1.

Apparent molecular mass and protein stability for MJ0366 and MJ0366-ssrA

Protein	Theoretical molecular mass for a dimer, kDa	Experimental molecular mass,* kDa	ΔGw,† kcal/mol	m value,† kcal mol−1 M−1
MJ0366-ssrA	27.8	24	9 ± 1	2.9 ± 0.6
MJ0366	23	22	9 ± 0.3	3.1 ± 0.1

Show are errors obtained from the fitted procedure.

^*Values were determined by size exclusion chromatography.

^†Determinations were obtained following the circular dichroism as a function of the concentration of Guanidine hydrochloride analyzed in terms of a two-state N ↔ U transition model.