The Protein Phosphatase 4 Complex Functions in miRNA Biogenesis in Arabidopsis

MicroRNAs (miRNAs) are short (typically 21–22 nucleotide), single-stranded noncoding RNAs that regulate gene expression, mainly via posttranscriptional gene silencing. The miRNA biogenesis pathway is complex, involving numerous proteins, and is highly conserved in plants. If this pathway is