3I90 CRYSTAL STRUCTURE OF HUMAN CHROMOBOX HOMOLOG 6 (CBX6) WITH H3K27 PEPTIDE TRANSCRIPTION, CHROMOBOX HOMOLOG 6, CBX6, H3K27 PEPTIDE, STRUCTURAL GENOMICS, STRUCTURAL GENOMICS CONSORTIUM, SGC, CHROMATIN REGULATOR, NUCLEUS, PHOSPHOPROTEIN, REPRESSOR, TRANSCRIPTION REGULATION