MMS21 is a SUMO E3 ligase that is conserved in eukaryotes, and has previously been shown to be required for DNA repair and maintenance of chromosome integrity. Loss of the Arabidopsis MMS21 causes defective meristems and dwarf phenotypes. | Nội dung Text SUMO E3 ligase AtMMS21 is required for normal meiosis and gametophyte development in Arabidopsis