A measurement of the inclusive deep-inelastic neutral current e p scattering cross section is reported in the region of four-momentum transfer squared, 12{=Q^2{=150 GeV^2, and Bjorken x, 2x10^-4{=x{=0.1.A QCD analysis at next-to-leading order is performed to determine the parton distributions in the proton based on H1 data.