The structures of the pyoverdins from two Pseudomonas fluorescens strains accepted mutually by their respective producers

From Pseudomonas fluorescens PL7 and PL8 structurally related pyoverdins were isolated and their primary structures were elucidated by spectroscopic methods and degradation reactions. Despite of some structural differences both Fe(III) complexes are taken up by either strain with a high rate. The implications regarding the recognition at the cell surface are discussed.