Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Plant viral intergenic DNA sequence repeats with transcription enhancing activity | Virology Journal BioMed Central Research Open Access Plant viral intergenic DNA sequence repeats with transcription enhancing activity Jeff Velten 1 Kevin J Morey2 and Christopher I Cazzonelli1 Address 1USDA-ARS Plant Stress and Water Conservation Laboratory 3810 4th St. Lubbock TX 79415 USA and 2Department of Biology Colorado State University Fort Collins CO 80523 USA Email JeffVelten - jvelten@ Kevin J Morey - Christopher I Cazzonelli - ccazzonelli@ Corresponding author Published 24 February 2005 Received 14 December 2004 Accepted 24 February 2005 Virology Journal 2005 2 16 doi 1743-422X-2-16 This article is available from http content 2 1 16 2005 Velten et al licensee BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License http licenses by which permits unrestricted use distribution and reproduction in any medium provided the original work is properly cited. Abstract Background The geminivirus and nanovirus families of DNA plant viruses have proved to be a fertile source of viral genomic sequences clearly demonstrated by the large number of sequence entries within public DNA sequence databases. Due to considerable conservation in genome organization these viruses contain easily identifiable intergenic regions that have been found to contain multiple DNA sequence elements important to viral replication and gene regulation. As a first step in a broad screen of geminivirus and nanovirus intergenic sequences for DNA segments important in controlling viral gene expression we have mined a large set of viral intergenic regions for transcriptional enhancers. Viral sequences that are found to act as enhancers of transcription in plants are likely to contribute to viral gene activity during infection. Results DNA sequences from the intergenic regions of 29 geminiviruses or nanoviruses were scanned .
