cell culture experiments using haematoporphyrin photosensitized bovine hoof fibroblasts and long-wave uv-irradiation revealed two distinct and separable patterns of lethal photosensitization according to two different sensitization procedures : ( 1 ) photosensitization of cell membranes by short exposure ( 5 min ) of cells to haematoporphyrin .
C0007603
cell membranes
C0007634
cells