Figure 1.

The limbs of amphibians (left) and the fins of zebrafish (middle) both regenerate when amputated (right). Recent work in salamanders [1] has uncovered some similarities between cells undergoing regeneration and stem cells. In zebrafish [5], histone methylation/demethylation may have a key role in controlling gene expression during fin regeneration.

Whited and Tabin Journal of Biology 2010 9:15   doi:10.1186/jbiol224
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