Species	Reference gene ID	Possible function	Papers / DOI
Arabidopsis	At2g33540	Completely dephosphorylates 'Ser-2', and partially 'Ser-5' and 'Ser-7' of the heptad repeats YSPTSPS in the C-terminal domain (CTD) of the largest RNA polymerase II subunit (RPB1).	C-terminal domain phosphatase-like family members (AtCPLs) differentially regulate Arabidopsis thaliana abiotic stress signaling, growth, and development.; 2002; DOI: 10.1073/pnas.112276199; PMID: 12149434; https://pubmed.ncbi.nlm.nih.gov/12149434/ | Arabidopsis carboxyl-terminal domain phosphatase-like isoforms share common catalytic and interaction domains but have distinct in planta functions.; 2006; DOI: 10.1104/pp.106.084939; PMID: 16905668; https://pubmed.ncbi.nlm.nih.gov/16905668/ | Modulation of RNA polymerase II phosphorylation downstream of pathogen perception orchestrates plant immunity.; 2014; DOI: 10.1016/j.chom.2014.10.018; PMID: 25464831; https://pubmed.ncbi.nlm.nih.gov/25464831/ | A genetics screen highlights emerging roles for CPL3, RST1 and URT1 in RNA metabolism and silencing.; 2019; DOI: 10.1038/s41477-019-0419-7; PMID: 31076735; https://pubmed.ncbi.nlm.nih.gov/31076735/
Arabidopsis	At5g58003	Processively dephosphorylates 'Ser-2' and/or 'Ser-5' of the heptad repeats YSPTSPS in the C-terminal domain of the largest RNA polymerase II subunit (RPB1).	Arabidopsis carboxyl-terminal domain phosphatase-like isoforms share common catalytic and interaction domains but have distinct in planta functions.; 2006; DOI: 10.1104/pp.106.084939; PMID: 16905668; https://pubmed.ncbi.nlm.nih.gov/16905668/
Arabidopsis	At3g19600	Mediates the dephosphorylation of 'Ser-2' of the heptad repeats YSPTSPS in the C-terminal domain of the largest RNA polymerase II subunit (RPB1).	AtCPL5, a novel Ser-2-specific RNA polymerase II C-terminal domain phosphatase, positively regulates ABA and drought responses in Arabidopsis.; 2011; DOI: 10.1111/j.1469-8137.2010.03601.x; PMID: 21231936; https://pubmed.ncbi.nlm.nih.gov/21231936/