lühikesed aminohapete järjestused valgu struktuuris, mis määravad tema selektiivse transpordi tsütoplasmast tuuma läbi tuumapoori kompleksi, A nuclear localization signal or sequence (NLS) is an amino acid sequence that 'tags' a protein for import into the cell nucleus by nuclear transport. Typically, this signal consists of one or more short sequences of positively charged lysines or arginines exposed on the protein surface