Abstract
Sumoylation is an essential post-translational modification in Arabidopsis thaliana, which entails the conjugation of the SUMO protein onto lysine residues in target proteins. In Arabidopsis, 2 closely related genes, SUMO1 and SUMO2, act redundantly and are in combination essential for plant development, i.e. the combined loss of SUMO1 and SUMO2
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