PROTEIN CHEMOTAXONOMY OF GENUS DATURA .4. AMINO-ACID-SEQUENCE OF DATURA FERREDOXINS DEPENDS NOT ON THE SPECIES BUT THE SECTION OF DATURA PLANTS FROM WHICH IT COMES

The complete amino acid sequences of [2Fe-2S] ferredoxins from Datura quercifolia (section Stramonium) and D, fastuosa (section Dutra) have been determined by automated Edman degradation of the entire Cm-protei n and of the peptides obtained by tryptic digestion and CNBr treatment , The D, quercifolia and D. fastuosa ferredoxins exhibited identical a mino acid sequences to D, stramonium (section Stramonium) and D. metal (section Dutra) ferredoxins, respectively. This result suggests that the amino acid sequence of Datura ferredoxins depends on the section b ut not the species of Datura plants.