ID4 (Inhibitor Of DNA Binding 4, HLH Protein): ID4 acts as a regulator of gene transcription and is involved in the control of cell differentiation and proliferation. It is part of the ID protein family, which plays roles in the regulation of a wide range of developmental processes by inhibiting the binding of basic helix-loop-helix (bHLH) transcription factors. ID4 is implicated in the pathogenesis of several types of cancer, where it may act as a tumor suppressor or oncogene, depending on the context. The study of ID4 offers insights into cellular differentiation, stem cell biology, and cancer....