A NEW MIDDLE REPETITIVE SEQUENCE OF NICOTIANA-PLUMBAGINIFOLIA GENOME

A middle repetitive sequence NPR18 was isolated from Nicotiana plumbag inifolia nuclear genome [8]. Sequences homologous to the repeat are di spersed through genomes of several Nicotiana species. Computer-assiste d data analysis of NPR18 primary sequence reveals several features att ributed to mobile genetic elements: an AT content higher than average for nuclear DNA of genus Nicotiana plants; a number of direct and inve rted repeats. Some of the repeats displayed homology to the terminal a nd subterminal repeats of Ac/Ds-like plant elements.