title: Biggest challenge since the double helix.
mesh_terms: D001483:Base Sequence; D002454:Cell Differentiation; D002843:Chromatin / Q000235:genetics; D004247:DNA / Q000235:genetics; D005786:Gene Expression Regulation; D005796:Genes; D009876:Operon; D012333:RNA, Messenger / Q000378:metabolism; D012261:Ribonucleoproteins / Q000235:genetics; D014158:Transcription, Genetic
chemical_list: D002843:Chromatin; D012333:RNA, Messenger; D012261:Ribonucleoproteins; D004247:DNA