TABLE 1.

Sudan Black B staining of R. meliloti strains

Strain	Relevant genotype	Stained by Sudan Black B	Reference or source
Rm1021	Wild type	No	20
Rm7210	exoY210::Tn5	Yes	20
Rm6024	exoB94::Tn5-233	Yes	12
Rm8049	exoA::Tn5	Yes	20
Rm6089	exoF::Tn5	Yes	20
Rm8545	exoO::Kan	Yes	13
Rm8285	exoW28::Tn5	Yes	13
Rm8600	expR101	No	12
Rm9000	exoY210::Tn5 expR101	No	15
Rm8603	exoF55::Tn5-233 expR101	No	12
Rm8601	exoA32::Tn5-233 expR101	No	12
Rm10000	expA61::Tn5-Tp exoA125::Tn5 expR101	Yes	12
Rm8064	expA125::Tn5	No	12
Rm10001	expA::Tn5 exoA32::Tn5-233	Yes	J. W. Reed and G. C. Walker