TABLE 1.
List of the Nostoc strains used in this study.
| Strain name | Description/Antibiotic resistance | Origin |
| Wild type | Nostoc/Anabaena PCC 7120 wild type strain | Pasteur Cyanobacterial Collection |
| pkn22 mutant | Nostoc insertion mutant of the pkn22 gene/(Sp/SmR) | Xu et al., 2003 |
| pknC | pkn22 mutant containing the pRL-petE-pkn22 plasmid/(Sp/SmR and NeoR) | Yingping et al., 2015 |
| pkn22/pkn[K63R] | pkn22 mutant containing a pRL-petE-pkn22 plasmid derivative where the pkn22 gene has been mutated to encode for a K63R substitution/(Sp/SmR and NeoR) | This study |
| pkn22/hetR | pkn22 mutant containing the pRL-petE-hetR plasmid/(Sp/SmR and NeoR) | This study |
| ΔhetR | Nostoc deletion mutant of the hetR gene | Borthakur et al., 2005 |
| ΔhetR/hetR | ΔhetR mutant containing the pRL-petE-hetR plasmid/(NeoR) | This study |
| ΔhetR/hetR[S127A], ΔhetR/hetR[S179a], ΔhetR/hetR[S130A], ΔhetR/hetR[S130D], ΔhetR/hetR[P202L], ΔhetR/hetR[S127G], ΔhetR/hetR[S127G] | ΔhetR mutant containing a pRL-petE plasmid harboring a hetR mutated gene encoding for the amino acid substitutions indicated between brackets/(NeoR) | This study |