Jagged-1 (188-204) is a functional fragment of the JAG-1 protein. As an activator of the Notch signaling pathway, it has a significant effect on cell fate, proliferation, differentiation, and apoptosis, and promotes the maturation of monocyte-derived dendritic cells. In addition, this fragment is also involved in the process of pulmonary fibrosis and affects the transformation of cell phenotypes. It is used to study the Notch signaling pathway in the field of scientific research.