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LDOC1, also known as Protein LDOC1, is a 146 amino acid protein that is 17 kDa, nucleus located, down-regulated in some cancer cell lines, thought to act as a regulator of the transcriptional response mediated by the nuclear factor kappa B (NF-kappaB), and may participate in the development and/or progression of some cancers. This protein is currently being studied for research on the following diseases and disorders: breast cancer, cryptorchidism, chronic lymphocytic leukemia, lymphocytic leukemia, pancreatic cancer, thyroiditis, pancreatitis, and leukemia. Interactions with LDOC1 protein have been shown to involve over 40 proteins including FXR2, ABLIM1, NRIP1, FOSL1, and CCDC858 proteins in negative regulation of cell proliferation pathwyas.