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Cover picture: Whole-mount immunohistochemical staining with anti-neurofilament antibody (2H3) was used to identify recessive mouse mutations that affect general and region-specific development of cranial nerves in a forward genetic screen. The top panels show the cranial nerves of normal C57BL/6J mouse embryos at embryonic day 10.5, and the bottom panels show disrupted cranial nerve development in five different mutant embryos. For details, see the article by Mar et al. in this issue (pages 11787–11795).