The claimed invention pertains to a novel protein called Geminin which is able to inhibit DNA replication and/or induce neurogenesis. The claimed invention includes the amino acid sequence, the nucleic acid sequence, and various domains thereof. The invention further relates to methods for treating patients with a proliferative disease by administering an effective amount of the Geminin protein and/or nucleic acid. Similarly, the claimed inventions pertains to methods for treating various neurological disorders by administering neuronal cells which were differentiated by exposure to Geminin.
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