Figure 1From: Characterization and expression patterns of let-7 microRNA in the silkworm (Bombyx mori)Stem-loop structures of alternative forms of bmo-let-7 precursor. The mature sequences are in red, shown in the foldback of the precursors.let-7 small RNA of silkworm is 22 nt or 23 nt long, and the precursor is 87 nt or 72 nt long. The actual size of the stem-loop structure is not known experimentally and may be slightly shorter or longer than represented.Back to article page