物种	参考基因 ID	可能功能	对应论文 / DOI
拟南芥	At2g40030	DNA 依赖性 RNA 聚合酶使用四种核糖核苷三磷酸作为底物催化 DNA 转录为 RNA。	Atypical RNA polymerase subunits required for RNA-directed DNA methylation.; 2005; DOI: 10.1038/ng1580; PMID: 15924141; https://pubmed.ncbi.nlm.nih.gov/15924141/ | Reinforcement of silencing at transposons and highly repeated sequences requires the concerted action of two distinct RNA polymerases IV in Arabidopsis.; 2005; DOI: 10.1101/gad.348405; PMID: 16140984; https://pubmed.ncbi.nlm.nih.gov/16140984/ | The Arabidopsis chromatin-modifying nuclear siRNA pathway involves a nucleolar RNA processing center.; 2006; DOI: 10.1016/j.cell.2006.05.031; PMID: 16839878; https://pubmed.ncbi.nlm.nih.gov/16839878/ | PolIVb influences RNA-directed DNA methylation independently of its role in siRNA biogenesis.; 2008; DOI: 10.1073/pnas.0709632105; PMID: 18287047; https://pubmed.ncbi.nlm.nih.gov/18287047/ | NRPD1a and NRPD1b are required to maintain post-transcriptional RNA silencing and RNA-directed DNA methylation in Arabidopsis.; 2008; DOI: 10.1111/j.1365-313x.2008.03525.x; PMID: 18433438; https://pubmed.ncbi.nlm.nih.gov/18433438/