Ribosome structure Prokaryotic Eukaryotic TRNA 23S rRNA 1 6S rRNA 28S. 5.8S TRNA 18S rRNA (2900 bases)!(1540 bases (4800 bases+ (1900 bases 5s TRNA 植物细胞、真菌细 5S TRNA (120 bases (120 bases)! 胞与原生动物细 胞内,核糖体的 proteins L1, L2 L1.L2 s1.S2 S33 大亚单位中却不 是28S「RNA而是 2526S rRNA subunits 60s (small) complete niosomes 70S 80S植物细胞、真菌细 胞与原生动物细 胞内，核糖体的 大亚单位中却不 是28S rRNA,而是 25～26S rRNA