Analysis of Expression Pattern and Function of Osε-cop1 in Rice (Oryza sativa) Characterization of the Ubiquitin E2 Enzyme Variant Gene Family in Arabidopsis Targeting Proteins for Degradation by Arabidopsis COP1: Teamwork Is What Matters cDNA Cloning and mRNA Expression of Photomorphogenic Negative Regulator COP1 in‘Tsuda’Turnip(Brassica rapa L. ssp. rapifera