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The 2006 model was a step in controlling the parallelism the same way it is done in nature in symporters and antiporters: these processes take place through protein channels embedded at the level of the membrane which can only be used by a molecule at a time, thus yielding a sequentiality with respect to the number of such proteins embedded in the membrane.<\/jats:p>","DOI":"10.1142\/s0129054111007812","type":"journal-article","created":{"date-parts":[[2011,1,21]],"date-time":"2011-01-21T10:43:19Z","timestamp":1295606599000},"page":"39-53","source":"Crossref","is-referenced-by-count":10,"title":["<font>P<\/font>SYSTEMS WITH PROTEINS ON MEMBRANES: A SURVEY"],"prefix":"10.1142","volume":"22","author":[{"given":"ANDREI","family":"P\u0102UN","sequence":"first","affiliation":[{"name":"Computer Science, FMI, University of Bucharest, Bucharest, Romania"},{"name":"National Institute of R&amp;D for Biological Sciences, Bucharest, Romania"},{"name":"Computer Science\/IfM, Louisiana Tech University, Ruston, USA"},{"name":"Facultad de Inform\u00e1tica, Universidad Polit\u00e9cnica de Madrid, Madrid, Spain"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"MIHAELA","family":"P\u0102UN","sequence":"additional","affiliation":[{"name":"Facultad de Inform\u00e1tica, Universidad Polit\u00e9cnica de Madrid, Campus de Montegancedo s\/n, Boadilla del Monte, 28660 Madrid, Spain"},{"name":"Department of Mathematics and Statistics, Louisiana Tech University, P.O. 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