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ge der limb and tail regeneration. Important grafting experi- Yakushiji et al., 2009). This regeneration occurs beforetrace cells and to test cell-autonomous versus-nonautono- been applied to the Japanese newt and Iberian ribbed 13).More-1980). Second, the distinct anatomy of the zebrafish fin from the tetrapod limb limits what we can infer from fins over, germline EGFP and nuclear Cherry-expressing trans-genic axolotls were used in combination with tissuemous events (Muneoka et al., 1986; Pescitelli and Stocum, newt (Casco-Robles et al., 2010;Hayashi et al., 20ments delineated the fundamental tissue interactions involved that provide a rich basis for a molecular under-standing of regeneration (Bryant and Iten, 1977; Duni