Delta-like ligands are a group of proteins that play a crucial role in cell communication, particularly in the development of the nervous system and the immune response. They are part of the Notch signaling pathway, which helps regulate cell fate decisions during embryonic development and tissue homeostasis. These ligands interact with Notch receptors on neighboring cells, triggering a cascade of events that influence cell differentiation and proliferation. Delta-like ligands are essential for maintaining proper cellular functions and ensuring that cells respond appropriately to their environment, which is vital for overall organism health.