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In the present photoemission study of a cuprate superconductorBi1.74Pb0.38Sr1.88CuO6+delta, we discovered a large scale dispersion of thelowest band, which unexpectedly follows the band structure calculation verywell. The incoherent nature of the spectra suggests that the hopping-dominateddispersion occurs possibly with the assistance of local spin correlations. Agiant kink in the dispersion is observed, and the complete self-energycontaining all interaction information is extracted for a doped cuprate in thelow energy region. These results recovered significant missing pieces in ourcurrent understanding of the electronic structure of cuprates.Comment: 4 pages, 3 figures, submitted to Phys. Rev. Lett. on May 21, 200

High-Energy Scale Revival and Giant Kink in the Dispersion of a Cuprate Superconductor