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Cover picture: Left, Drawing of a peripheral nerve regenerating after transection. Thin, silver-stained axonal sprouts cross the gap; some go astray, and a few enter the distal stump (bottom region). (This image was obtained from "Degeneration and Regeneration of the Nervous System," by Ramon y Cajal.) Right, Confocal image of regenerating axons in the saphenous nerve of a transgenic mouse in which peripheral neurons express yellow fluorescent protein (YFP). Use of this transgenic technology allows investigators to see what Ramon y Cajal saw, but live and in color. For details, see the article by Pan et al. in this issue (pages 11479-11488).
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