(A) Schematic of MEG-3 function by region. The disordered region (green), ordered C-terminus (white), and HMG-like motif (blue) are indicated. (B) Schematics of one-cell zygotes showing distribution of MEG-3 (green) and PGL-3 (magenta). Wild-type MEG-3 forms robust condensates that recruit RNA and interact with, and enrich, PGL-3 condensates in posterior cytoplasm. MEG-3Cterm forms condensates that do not recruit RNA but still interact with, and enrich, PGL-3 condensates in posterior. MEG-3IDR localizes in posterior-rich cytoplasm but does not form condensates, and does not localize PGL-3. MEG-3HMGL- assembles condensates in posterior cytoplasm that do not recruit RNA and do not interact efficiently with, nor localize, PGL-3 condensates.