TRANSCRIPTION, RING FINGER PROTEIN 4, RNF4, RES4-26, RING DOMAIN, ZINC- BINDING DOMAIN, STRUCTURAL GENOMICS, NPPSFA, NATIONAL PROJECT ON PROTEIN STRUCTURAL AND FUNCTIONAL ANALYSES, RIKEN STRUCTURAL GENOMICS/PROTEOMICS INITIATIVE, RSGI 2EA6 SOLUTION STRUCTURE OF THE RING DOMAIN OF THE HUMAN RING FINGER PROTEIN 4