RESUMEN
An actinomycetes which produced soluble blue pigment was isolated from the soil sample in Nanjing,China.Based on its cell chemical characteristics and 16S rDNA sequence we found that its cell wall contained L-diaminopimelic acid and glycine,the whole cell hydrolysates contained glucose and ribose,whole cell contained fatty acid from C14 to C17 with 12-methyltetradecanoic(anteiso-15) and 14-methylpentadentadecanoic acid(iso-16) as the major components.The results shown that,it belongs to the genus Streptomyces.Phylogenetic tree of 16S rDNA sequences indicated that all strains were clustered into 9 branches.All strains that could produce blue pigment were clustered into 2 branches,they were S.coelicolor、S.cyaneus.The isolate closely related to Streptomyces indigocolor with a similarity of 99.4% fell into S.cyaneus branch.