Streptomyces purpeofuscus

Also ( Rj-fl- Lys 4 is found to be a substructure of several antibiotics. Examples are the hydrazinodipeptide negamycin 26 from Streptomyces purpeofuscus, bellenamine 28 from Streptomyces nashvillensis (Actinobacteria), and sperabillins A-D 25 from Pseudomonas Jluorescens (Proteobacteria). 

There are studies that indicate a particular mode of action as a natural algicide, without elucidating that it is a primary site. For example, Kida [140,141] reported that the Streptomyces purpeofuscus product 7-deoxy-D-glycero-D-glucoheptose inhibited chlorophyll synthesis in the green alga Scenedesmus obliquus. Yet, only chlorophyll accumulation was measured. Phytotoxins with many other sites of action could cause a similar effect. 

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