Description:4DNESWM4U8RX: Chromatin tracing of BX-C in Drosophila - WT at Fub locus, 10-kb resolution Optical Reconstruction of Chromatin Architecture (ORCA) of a 700-kb region including the bithorax complex (BX-C) and flanking domains at 10-kb steps in fly embryos that are wild-type at the Fub locus (+/+). Additionally, 29 mRNA and nascent RNA species are detected by sequential RNA FISH.