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1.1 Richard F. Outcault, Buster Brown and His Dog Tige and Their Jolly Times (New York: Cupples & leon, 1906), front cover. 22 1.2 Eadweard Muybridge,‘Horse at Full Gallop’, photograph, undated, Bill Douglas Cinema Museum
Derivation of mouse extraembryonic endoderm stem cell lines, and exclusive transmission of the embryonic stem cell-derived genome through the mouse germline