title: PAS: a multifunctional domain family comes to light.
authors.forename: C P
authors.initials: CP
authors.lastname: Ponting
authors.forename: L
authors.initials: L
authors.lastname: Aravind
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D004268:DNA-Binding Proteins / Q000737:chemistry*; D019143:Evolution, Molecular; D018257:Helix-Loop-Helix Motifs; D006801:Humans; D008969:Molecular Sequence Data; D005810:Multigene Family; D014157:Transcription Factors / Q000737:chemistry*
chemical_list: D004268:DNA-Binding Proteins; D014157:Transcription Factors