| siderophore | Natural iron binding compounds that chelate ferric ions (which form insoluble colloidal hydroxides at neutral pH and are then inaccessible) and are then taken up together with the metal ion. See: sideramines. (18 Nov 1997) |
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| siderophores | Low-molecular-weight compounds produced by microorganisms that aid in the transport and sequestration of ferric iron. (the encyclopedia of molecular biology, 1994) (12 Dec 1998) |