Phylogenetic analysis of marine actinomycetes isolates. The neighbor-joining tree of the three marine actinomycetes isolates (SM11, SM14, and SM15) was based on the 16S rRNA gene sequences. Streptomyces albus subsp. albus DSM 40313T is represented as an outgroup. The bootstrap values, based on 1,000 replications, are shown at the nodes; only values above 50% are given. The scale bar indicates 0.0050 substitutions per nucleotide position.