2ECZ SIGNALING PROTEIN, GLYCOPROTEIN, MEMBRANE, NUCLEAR PROTEIN, PHOSPHORYLATION, POLYMORPHISM, SH3 DOMAIN, TRANSPORT, STRUCTURAL GENOMICS, NPPSFA, NATIONAL PROJECT ON PROTEIN STRUCTURAL AND FUNCTIONAL ANALYSES, RIKEN STRUCTURAL GENOMICS/PROTEOMICS INITIATIVE, RSGI SOLUTION STRUCTURE OF THE SH3 DOMAIN OF SORBIN AND SH3 DOMAIN-CONTAINING PROTEIN 1