title: Gene regulation: boundaries within limits.
abstract: Quantitative measurements of the Hunchback transcription factor in Drosophila embryos show that its target genes can respond with a high degree of precision to the exact level of the protein, simulating a continuous, analog readout, while other target genes show a combinatorial effect, resembling a Boolean logic element.
authors.affiliation: Department of Biochemistry and Molecular Biology, Michigan State University, East Lansing, Michigan 48824-1319, USA.
authors.forename: Sandhya
authors.initials: S
authors.lastname: Payankaulam
authors.forename: David N
authors.initials: DN
authors.lastname: Arnosti
mesh_terms: D000818:Animals; D019521:Body Patterning / Q000235:genetics; D004268:DNA-Binding Proteins / Q000235:genetics / Q000378:metabolism* / Q000502:physiology; D004330:Drosophila / Q000196:embryology* / Q000235:genetics / Q000378:metabolism; D029721:Drosophila Proteins / Q000235:genetics / Q000378:metabolism* / Q000502:physiology; D004625:Embryo, Nonmammalian / Q000378:metabolism*; D047108:Embryonic Development / Q000235:genetics; D019143:Evolution, Molecular; D018507:Gene Expression Regulation, Developmental; D018398:Homeodomain Proteins / Q000235:genetics / Q000378:metabolism; D008957:Models, Genetic; D015534:Trans-Activators / Q000235:genetics / Q000378:metabolism; D014157:Transcription Factors / Q000235:genetics / Q000378:metabolism* / Q000502:physiology
chemical_list: D004268:DNA-Binding Proteins; D029721:Drosophila Proteins; D018398:Homeodomain Proteins; D015534:Trans-Activators; D014157:Transcription Factors; C056478:bcd protein, Drosophila; C061245:hb protein, Drosophila