Shaanxi Normal University College of Life Sciences 1 article published in JoVE Developmental Biology A Protocol for Immunohistochemistry and RNA In-situ Distribution within Early Drosophila Embryo Wei Zhang*1, Xinjuan Lei*1, Xin Zhou*2,3, Boling He1, Liqin Xiao1, Huimin Yue1, Shulin Wang1, Yuting Sun1, Yajun Wu1, Liyang Wang1,4, George Ghartey-Kwansah1, Odell D. Jones5, Joseph L. Bryant6, MengMeng Xu7, Jianjie Ma3, Xuehon Xu1 1National Engineering Laboratory for Resource Development of Endangered Crude Drugs in Northwest of China/CGDB, Shaanxi Normal University College of Life Sciences, 2 Here, we describe a protocol for detection and localization of Drosophila embryo protein and RNA from collection to pre-embedding and embedding, immunostaining, and mRNA in situ hybridization.