LMNB1 (Lamin B1): LMNB1 encodes Lamin B1, a component of the nuclear lamina, a fibrous layer underlying the inner nuclear membrane that provides structural support to the nucleus. Lamin B1 is involved in DNA replication, chromatin organization, and the regulation of gene expression. Mutations or alterations in LMNB1 expression have been linked to a variety of developmental disorders and diseases, including laminopathies, which affect muscle, fat, and bone tissue, and premature aging syndromes....