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<article article-type="research-article" dtd-version="1.3" 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" xml:lang="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">mais</journal-id><journal-title-group><journal-title xml:lang="ru">Моделирование и анализ информационных систем</journal-title><trans-title-group xml:lang="en"><trans-title>Modeling and Analysis of Information Systems</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1818-1015</issn><issn pub-type="epub">2313-5417</issn><publisher><publisher-name>Yaroslavl State University</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.18255/1818-1015-2019-3-365-404</article-id><article-id custom-type="elpub" pub-id-type="custom">mais-1230</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>Computer System Organization</subject></subj-group></article-categories><title-group><article-title>Новый подход к моделированию генных сетей</article-title><trans-title-group xml:lang="en"><trans-title>New Approach to Gene Network Modeling</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-6403-4061</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Глызин</surname><given-names>Сергей Дмитриевич</given-names></name><name name-style="western" xml:lang="en"><surname>Glyzin</surname><given-names>Sergey D.</given-names></name></name-alternatives><bio xml:lang="ru"><p>доктор физ.-мат. наук, профессор</p></bio><bio xml:lang="en"><p>professor</p></bio><email xlink:type="simple">glyzin@uniyar.ac.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-5066-0881</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Колесов</surname><given-names>Андрей Юрьевич</given-names></name><name name-style="western" xml:lang="en"><surname>Kolesov</surname><given-names>Andgey Yu.</given-names></name></name-alternatives><bio xml:lang="ru"><p>доктор физ.-мат. наук, профессор</p></bio><bio xml:lang="en"><p>professor</p></bio><email xlink:type="simple">kolesov@uniyar.ac.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-9330-549X</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Розов</surname><given-names>Николай Христович</given-names></name><name name-style="western" xml:lang="en"><surname>Rozov</surname><given-names>Nikolay Kh.</given-names></name></name-alternatives><bio xml:lang="ru"><p>доктор физ.-мат. наук, профессор</p></bio><bio xml:lang="en"><p>professor</p></bio><email xlink:type="simple">fpo.mgu@mail.ru</email><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Ярославский государственный университет им. П.Г. Демидова</institution><country>Россия</country></aff><aff xml:lang="en"><institution>P.G. Demidov Yaroslavl State University</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Московский государственный университет им. М. В. Ломоносова</institution><country>Россия</country></aff><aff xml:lang="en"><institution>M.V. Lomonosov Moscow State University</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2019</year></pub-date><pub-date pub-type="epub"><day>28</day><month>09</month><year>2019</year></pub-date><volume>26</volume><issue>3</issue><fpage>365</fpage><lpage>404</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Глызин С.Д., Колесов А.Ю., Розов Н.Х., 2019</copyright-statement><copyright-year>2019</copyright-year><copyright-holder xml:lang="ru">Глызин С.Д., Колесов А.Ю., Розов Н.Х.</copyright-holder><copyright-holder xml:lang="en">Glyzin S.D., Kolesov A.Y., Rozov N.K.</copyright-holder><license xml:lang="ru" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>Данная работа распространяется под лицензией Creative Commons Attribution 4.0.</license-p></license><license xml:lang="en" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>This work is licensed under a Creative Commons Attribution 4.0 License.</license-p></license></permissions><self-uri xlink:href="https://www.mais-journal.ru/jour/article/view/1230">https://www.mais-journal.ru/jour/article/view/1230</self-uri><abstract><p>Статья посвящена математическому моделированию искусственных генных сетей. Рассматривается феноменологическая модель простейшей трехзвенной осцилляторной генной сети — так называемого репрессилятора. Эта сеть содержит три элемента, однонаправленно связанных в кольцо. Первый из них ингибирует синтез второго, второй ингибирует синтез третьего, а третий, который замыкает цикл, ингибирует синтез первого. Взаимодействие концентраций белка и концентрации мРНК удивительно похоже на функционирование биоценоза, состоящего из шести экологических популяций — трех хищников и трех жертв. Это позволяет предложить новую феноменологическую модель, которая представлена системой однонаправленно связанных обыкновенных дифференциальных уравнений. В работе изучена задача существования и устойчивости у этой системы релаксационного периодического решения, инвариантного по отношению к циклическим перестановкам координат. Для нахождения асимптотики этого решения строится специальная релейная система. В статье доказывается, что периодическое решение релейной системы дает асимптотическое приближение орбитально асимптотически устойчивого релаксационного цикла рассматриваемой задачи.</p></abstract><trans-abstract xml:lang="en"><p>The article is devoted to the mathematical modeling of artificial genetic networks. A phenomenological model of the simplest genetic network called repressilator is considered. This network contains three elements unidirectionally coupled into a ring. More specifically, the first of them inhibits the synthesis of the second, the second inhibits the synthesis of the third, and the third, which closes the cycle, inhibits the synthesis of the first one. The interaction of the protein concentrations and of mRNA (message RNA) concentration is surprisingly similar to the interaction of six ecological populations — three predators and three preys. This allows us to propose a new phenomenological model, which is represented by a system of unidirectionally coupled ordinary differential equations. We study the existence and stability problem of a relaxation periodic solution that is invariant with respect to cyclic permutations of coordinates. To find the asymptotics of this solution, a special relay system is constructed. It is proved in the paper that the periodic solution of the relay system gives the asymptotic approximation of the orbitally asymptotically stable relaxation cycle of the problem under consideration.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>искусственная генная сеть</kwd><kwd>репрессилятор</kwd><kwd>самосимметричный цикл</kwd><kwd>асимптотика</kwd><kwd>устойчивость</kwd></kwd-group><kwd-group xml:lang="en"><kwd>artificial gene network</kwd><kwd>repressilator</kwd><kwd>self-symmetric cycle</kwd><kwd>asymptotics</kwd><kwd>stability</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Исследование выполнено при финансовой поддержке РФФИ в рамках научного проекта № 18-29-10055.</funding-statement><funding-statement xml:lang="en">The reported study was funded by RFBR according to the research project № 18-29-10055.</funding-statement></funding-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Elowitz M. 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