Subcelluar Localization and Ligase Activity of AtPUB18 and Its Expression Pattern in Arabidopsis thaliana Arabidopsis C3HC4-RING finger E3 ubiquitin ligase AtAIRP4 positively regulates stress-responsive abscisic acid signaling Ubiquitination in Abscisic Acid-Related Pathway Targeting Proteins for Degradation by Arabidopsis COP1: Teamwork Is What Matters Functional analyses of an E3 ligase gene AIP2 from wheat in Arabidopsis revealed its roles in seed germination and pre-harvest sprouting Expression Responses of SUMO E3 Ligase(SIZ1)to Low Temperature Stress and Exogenous Melatonin in Postharvest Peach Fruit Four Closely-related RING-type E3 Ligases, APD1–4, are Involved in Pollen Mitosis II Regulation in Arabidopsis