Final answer:
Ovalbumin, when fused with a nuclear localization signal, would be transported into the nucleus of the cell. This is due to the presence of the NLS tag, which directs proteins to the nuclear compartment through the nuclear pore complexes.
Step-by-step explanation:
The process you're describing involves the importation of proteins into the nucleus. When a normal Nuclear Localization Signal (NLS) is fused to a protein such as ovalbumin and then injected into the cytoplasm of a cell, the newly formed fusion protein will be recognized by the cellular machinery responsible for nuclear import. This is based on the presence of the nuclear localization signal - a sequence of amino acids that act as a 'tag' directing the protein to the nucleus. In this case, the fusion protein, including ovalbumin, would be transported into the nucleus, as it is now bearing the appropriate signal for nuclear entry.
Protein trafficking is a highly regulated process in the cell, and only proteins with specific signal sequences are routed to particular cellular compartments. The nuclear localization signal typically consists of a sequence of positively charged amino acids, such as lysine and arginine. If a protein with a NLS is present in the cytoplasm, it will be transported into the nucleus through the nuclear pore complexes.
Ribosomal proteins and certain elements like tRNAs and mRNAs cross the nuclear envelope through nuclear pores as well. Despite the size of these molecules and particles, they are efficiently and selectively transported, ensuring the correct cellular localization and function.