"Chemokines are a family of small cytokines, or signaling proteins, that play a crucial role in immune system function by directing the migration of immune cells to sites of infection, inflammation, or injury. These proteins interact with specific G protein-coupled receptors on target cells, orchestrating processes like leukocyte trafficking, wound healing, and immune surveillance. Dysregulation of chemokine signaling is associated with autoimmune diseases, cancer metastasis, and chronic inflammatory conditions. For a detailed exploration of their structure, classification, and therapeutic applications, refer to this comprehensive overview of chemokines and their receptors."