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<article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:ali="http://www.niso.org/schemas/ali/1.0/" article-type="other" dtd-version="1.2" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">Problems of Virology</journal-id><journal-title-group><journal-title xml:lang="en">Problems of Virology</journal-title><trans-title-group xml:lang="ru"><trans-title>Вопросы вирусологии</trans-title></trans-title-group></journal-title-group><issn publication-format="print">0507-4088</issn><issn publication-format="electronic">2411-2097</issn><publisher><publisher-name xml:lang="en">Central Research Institute for Epidemiology</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">11833</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Articles</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Статьи</subject></subj-group><subj-group subj-group-type="article-type"><subject></subject></subj-group></article-categories><title-group><article-title xml:lang="en">Typing of bovine leucosis virus circulating in Ukraine</article-title><trans-title-group xml:lang="ru"><trans-title>Типирование вируса лейкоза крупного рогатого скота, циркулирующего в Украине</trans-title></trans-title-group></title-group><pub-date date-type="pub" iso-8601-date="2004-02-15" publication-format="electronic"><day>15</day><month>02</month><year>2004</year></pub-date><volume>49</volume><issue>1</issue><issue-title xml:lang="en">NO1 (2004)</issue-title><issue-title xml:lang="ru">№1 (2004)</issue-title><fpage>39</fpage><lpage>44</lpage><history><date date-type="received" iso-8601-date="2023-06-09"><day>09</day><month>06</month><year>2023</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2004, Limansky A.P., Geue L., Limanskaya O.Y., Beier D.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2004, Лиманский А.П., Geue L., Лиманская О.Ю., Beier D.</copyright-statement><copyright-year>2004</copyright-year><copyright-holder xml:lang="en">Limansky A.P., Geue L., Limanskaya O.Y., Beier D.</copyright-holder><copyright-holder xml:lang="ru">Лиманский А.П., Geue L., Лиманская О.Ю., Beier D.</copyright-holder><ali:free_to_read xmlns:ali="http://www.niso.org/schemas/ali/1.0/"/><license><ali:license_ref xmlns:ali="http://www.niso.org/schemas/ali/1.0/">https://creativecommons.org/licenses/by/4.0</ali:license_ref></license></permissions><self-uri xlink:href="https://virusjour.crie.ru/jour/article/view/11833">https://virusjour.crie.ru/jour/article/view/11833</self-uri><abstract xml:lang="en"><p>Bovine leucosis virus (BLV), circulating in the Ukrainian territory, was characterized through the definition of its subspecies affiliation. The pro-viral BLV DNA was isolated from peripheral-blood lymphocytes of naturally-HIVinfected black-variegate animals taken from leucosis-affected farms in the Kharkov Region. The env-gene fragment of pro-viral DNA was amplified, sequenced and analyzed after the amplicon had been treated by three restriction enzymes, i.e. BamH I, Bel I and Pvu II. According to the analysis of restriction-fragments' length polymorphism, the Ukrainian BLV isolate can be classified as belonging to the Australian subspecies, i.e. to one of the 3 known subspecies. Multiple alignment and phylogenetic analysis of the env-gene fragment of BLV isolates from the EMBL database showed that evolutionally the Ukrainian isolate is distantly located from the isolates' clusters of the Belgian, Japanese and Australian subspecie and has the biggest quantity (4) of non-coinciding nucleotides for the analyzed highly conservative locus of the BLV env-gene with a length of 444 pair of nucleotides.</p></abstract><trans-abstract xml:lang="ru"><p>Вирус лейкоза крупного рогатого скота (ВЛ КРС), циркулирующий на территории Украины, охарактеризован посредством определения подвидовой принадлежности. Провирусная ДНК ВЛ КРС выделена из лимфоцитов периферической крови животных черно-пестрой породы из неблагополучных в отношении лейкоза хозяйств Харьковской области, природно инфицированных ВЛ КРС. Фрагмент env-гена провирусной ДНК амплифицирован, секвенирован и проанализирован после обработки ампликона тремя ферментами рестрикции - BamHI, Bell, Pvull. Проведенный анализ полиморфизма длины рестрикционных фрагментов показал, что украинский изолят ВЛ КРС может быть классифицирован и отнесен к австралийскому подвиду, одному из 3 известных подвидов. Множественное выравнивание и филогенетический анализ фрагмента env-гена изолятов ВЛ КРС из базы данных EMBL продемонстрировали, что эволюционно украинский изолят расположен отдаленно от кластеров изолятов как бельгийского, японского, так и австралийского подвидов, а также имеет наибольшее количество (4) несовпадающих нуклеотидов для проанализированного высококонсервативного локуса env-гена ВЛ КРС длиной 444 пары нуклеотидов</p></trans-abstract><kwd-group xml:lang="en"><kwd>bovine leucosis virus</kwd><kwd>Ukraine</kwd><kwd>typing</kwd><kwd>DNA</kwd><kwd>polymerase chain reaction</kwd><kwd>analysis of restriction-fragments' length polymorphism</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>вирус лейкоза крупного рогатого скота</kwd><kwd>Украина</kwd><kwd>типирование</kwd><kwd>ДНК</kwd><kwd>полимеразная цепная реакция</kwd><kwd>анализ полиморфизма длины рестрикционных фрагментов</kwd></kwd-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Бродский Л. 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