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In addition to the three human importin\u2010\u03b1s already identified, we report here the primary structure of two new human importin\u2010\u03b1 proteins. The five known human importin\u2010\u03b1 subunits can be classified into three subfamilies that appear conserved in higher eukaryotic organisms. We show by immunoblotting that the different importin\u2010\u03b1 subfamilies are expressed in a variety of human tissues and mammalian cell lines.<\/jats:p>","DOI":"10.1016\/s0014-5793(97)01265-9","type":"journal-article","created":{"date-parts":[[2002,7,25]],"date-time":"2002-07-25T12:19:54Z","timestamp":1027599594000},"page":"104-108","source":"Crossref","is-referenced-by-count":195,"title":["Cloning of two novel human importin\u2010\u03b1 subunits and analysis of the expression pattern of the importin\u2010\u03b1 protein 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