Analysis of protein–protein interactions of AtIDD proteins and OsID1 with GRAS proteins or AtIDD proteins using yeast two-hybrid assay. The coding sequences (CDSs) for (A) AtIDD1, (B) AtIDD6, (C) AtIDD10, (D) AtIDD14, (E) AtIDD15, (F) AtIDD16, and (G) OsID1 in pGBT9 were used as baits. The CDSs for SHORT-ROOT (SHR), SCARECROW-LIKE 3 (SCL3), Arabidopsis DELLA proteins, rice DELLA (SLR1), and selected AtIDD proteins in pGAD424 were used as prey. Yeast cells carrying both prey and bait vectors were grown on -LW or -LWH with an appropriate concentration of 3-amino-1,2,4-triazole (3-AT). Empty, empty vector pGAD424.