Access Restriction

Author Allen, G. C. ♦ Hall, G. E. ♦ Childs, L. C. ♦ Weissinger, A. K. ♦ Spiker, S. ♦ Thompson, W. F.
Source World Health Organization (WHO)-Global Index Medicus
Content type Text
Publisher American Society of Plant Biologists
File Format HTM / HTML
Language English
Difficulty Level Medium
Subject Domain (in DDC) Computer science, information & general works ♦ Library & information sciences ♦ Natural sciences & mathematics ♦ Chemistry & allied sciences ♦ Life sciences; biology ♦ Physiology & related subjects ♦ Biochemistry ♦ Genetics and evolution ♦ Natural history of organisms ♦ Technology ♦ Medicine & health ♦ Human anatomy, cytology, histology ♦ Human physiology ♦ Pharmacology and therapeutics ♦ Diseases ♦ Manufacture for specific uses ♦ Precision instruments & other devices
Subject Domain (in MeSH) Cells ♦ Anatomy ♦ Eukaryota ♦ Organisms ♦ Enzymes and Coenzymes ♦ Nucleic Acids, Nucleotides, and Nucleosides ♦ Chemicals and Drugs ♦ Investigative Techniques ♦ Analytical, Diagnostic and Therapeutic Techniques and Equipment ♦ Chemical Phenomena ♦ Genetic Phenomena ♦ Biological Sciences ♦ Information Science ♦ Information Science
Subject Keyword Discipline Botany ♦ Cell Nucleus ♦ Metabolism ♦ Dna ♦ Genetics ♦ Gene Expression Regulation ♦ Base Sequence ♦ Cell Line ♦ Ultrastructure ♦ Enhancer Elements, Genetic ♦ Gene Amplification ♦ Glucuronidase ♦ Models, Genetic ♦ Molecular Sequence Data ♦ Plants, Toxic ♦ Replicon ♦ Saccharomyces Cerevisiae ♦ Tobacco ♦ Transformation, Genetic ♦ Journal Article ♦ Research Support, Non-u.s. Gov't ♦ Research Support, U.s. Gov't, Non-p.h.s.
Abstract The yeast ARS-1 element contains a scaffold attachment region (SAR) that we have previously shown can bind to plant nuclear scaffolds in vitro. To test effects on expression, constructs in which a chimeric beta-glucuronidase (GUS) gene was flanked by this element were delivered into tobacco suspension cells by microprojectile bombardment. In stably transformed cell lines, GUS activity averaged 12-fold higher (24-fold on a gene copy basis) for a construct containing two flanking SARs than for a control construct lacking SARs. Expression levels were not proportional to gene copy number, as would have been predicted if the element simply reduced position effect variation. Instead, the element appeared to reduce an inhibitory effect on expression in certain transformants containing multiple gene copies. The effect on expression appears to require chromosomal integration, because SAR constructs were only twofold more active than the controls in transient assays.
Description Author Affiliation: Allen GC ( Department of Botany, North Carolina State University, Raleigh 27695.)
ISSN 10404651
Educational Role Student ♦ Teacher
Age Range above 22 year
Educational Use Reading ♦ Research ♦ Self Learning
Interactivity Type Expositive
Education Level UG and PG
Learning Resource Type Article
Publisher Date 1993-06-01
Publisher Place United States
e-ISSN 1531298X
Volume Number 5
Issue Number 6

Source: WHO-Global Index Medicus