LCK (Lymphocyte-Specific Protein Tyrosine Kinase): LCK is a critical enzyme in the T-cell receptor (TCR) signaling pathway, playing a pivotal role in T-cell development and activation. It phosphorylates key proteins involved in the TCR signaling cascade, initiating the immune response. LCK's activity is essential for the adaptive immune system's function, and dysregulation can lead to autoimmune diseases or immunodeficiency. Its importance in T-cell function makes LCK a target for immunotherapy in cancer and autoimmune disorders....