Species	Reference gene ID	Possible function	Papers / DOI
Arabidopsis	At3g18680	Catalyzes the reversible phosphorylation of UMP to UDP.	A protein related to prokaryotic UMP kinases is involved in psaA/B transcript accumulation in Arabidopsis.; 2009; DOI: 10.1007/s11103-008-9433-2; PMID: 19037728; https://pubmed.ncbi.nlm.nih.gov/19037728/ | PUMPKIN, the Sole Plastid UMP Kinase, Associates with Group II Introns and Alters Their Metabolism.; 2019; DOI: 10.1104/pp.18.00687; PMID: 30409856; https://pubmed.ncbi.nlm.nih.gov/30409856/