OXIDOREDUCTASE, TRANSCRIPTION CO-REPRESSION, ACYLTRANSFERASE, BREFELDIN A, NAD, GOLGI MEMBRANE, ACYL-COA, ADP-RIBOSYLATION, CYTOPLASM, NUCLEUS, PHOSPHOPROTEIN, UBL CONJUGATION 3GA0 CTBP1/BARS GLY172->GLU MUTANT STRUCTURE: IMPAIRING NAD(H) BINDING AND DIMERIZATION