CR第2期上线，http://www.nature.com/cr/journal/v27/n2/index.html，新增2篇free文章，The guanine nucleotide exchange factor Net1 facilitates the specification of dorsal cell fates in zebrafish embryos by promoting maternal β-catenin activation http://www.nature.com/cr/journal/v27/n2/full/cr2016141a.html；Long-term propagation of tree shrew spermatogonial stem cells in culture and successful generation of transgenic offspring http://www.nature.com/cr/journal/v27/n2/full/cr2016156a.html