1) Biological pigment 
Pyoverdine (or pyoverdin) is a fluorescent siderophore produced by the Gram negative bacterium Pseudomonas aeruginosa. In Pseudomonas aeruginosa PAO1 there are 14 pvd genes involved in the synthesis of the pyoveridine. Unlike Enterobactin, Pyoverdine/pseudobactins are iron-binding non-ribosomal peptides containing a dihydroxyquinoline derivative. ...