TABLE 1.

Anabaena sp. strains used in this study

Strain	Resistancea	Genotype	Properties	Reference/Source
Anabaena sp. PCC 7120			Wild type
CSR10	SpR/SmR	alr4167::SpRSmR	Gene interruption by plasmid pCSV3	Ref. 70
AFS-I-alr2887	SpR/SmR	alr2887::SpRSmR	Gene interruption by plasmid pCSV3	Ref. 5
AFS-I-alr2215	SpR/SmR	alr2215::pMS1	Gene interruption by plasmid pMS1	This work
CSCW2	SpR/SmR	all4025::pCSW11	Gene interruption by gene cassette C.S3 (with partial gene deletion)	Ref. 7
AFS-I-HgdC	SpR/SmR	alr5346::pMS2	Gene interruption by plasmid pMS2	This work
AFS-I-alr2269	SpR/SmR	alr2269::SpRSmR	Gene interruption by plasmid pCSV3	Ref. 54
DR181	NmR	Δalr2887::C.K3	Partial replacement of alr2887 by C.K3 resistance cassette	Ref. 5

^a Sp, spectinomycin; Sm, streptomycin; Nm, neomycin.