related tags: 02000B 040308 0C6BB7 361E69 37668C 3D3157 4F3885 574C72 982C51 CF0040 dna enzymehistonedeacetylasehda6 genes hda6 nationalinstituteofgeneralmedicalsciencesnigms nationalinstitutesofhealth nigms nih ribosomalrna rnagenes