*2.3. YL Encodes an Organelle RNA Recognition Motif-Containing Protein 1 (GmORRM1)*

The *YL* gene (*Glyma.20G187000*) encodes a protein of 390 amino acids with a C-terminal RNA recognition motif (Figure 4A). The *yl* mutation occurred in the RNA recognition motif and resulted in the substitution of an alanine with a glutamic acid (Figure 4A). The alignment of amino acid sequences homologous to YL from several plant species showed that this alanine residue in the RNA recognition motif was highly conserved (Figure 4B). In addition, the YL sequence shared 62.3% similarity with *Arabidopsis* ORRM1 (AtORRM1, At3G20930) and 58.2% similarity with maize ORRM1 (ZmORRM1, GRMZM5G899787), suggesting that YL (GmORRM1) and its homologs might have conserved functions.
