Table 5 Near full-length 16S rRNA gene similarity matrix for ESFC-1, the two most-closely related cyanobacteria Spirulina spp. PCC 6313 and PCC 9445 (based on the phylogeny in Fig. 2), and the highest-scoring BLAST hit from the NCBI database (Aphanocapsa sp. HBC6, accession EU249123)