SEARCH Articles Figures Tables VTMCD spectra of clusters in wild type and mutant forms of P. furiosus Fd. In each case the spectra shown were recorded at temperatures between 1.5 and 50 K with an applied magnetic field of 4.5 or 6 T . [Publishers Imprint] [Publishers Imprint] [Publishers Imprint] [Publishers Imprint] [Publishers Imprint]