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Nuclear protein

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A nuclear protein is a protein found in the cell nucleus. Proteins are transported inside the nucleus with they help of the nuclear pore complex, which acts a barrier between cytoplasm and nuclear membrane. Many nuclear proteins contain positively charged amino acids such as Lysine and Arginine which acts as a signal to allow the protein to get transported into the nucleus while maintaining their fold. The import and export of proteins through the nuclear pore complex plays a fundamental role in gene regulation and other biological functions.