MOTOR PROTEIN, PROTEIN-LIGAND COMPLEX, ATP-BINDING, CELL CYCLE, CELL DIVISION, COILED COIL, MICROTUBULE, MITOSIS, NUCLEOTIDE-BINDING, PHOSPHOPROTEIN, POLYMORPHISM 3K3B CO-CRYSTAL STRUCTURE OF THE HUMAN KINESIN EG5 WITH A NOVEL TETRAHYDRO-BETA-CARBOLINE