PTPRC (Protein Tyrosine Phosphatase, Receptor Type C): PTPRC is a protein that serves as a key regulator of the immune system. Also known as CD45, it is a transmembrane protein tyrosine phosphatase essential for the activation of T and B lymphocytes. PTPRC plays a vital role in modulating signal transduction pathways, and its dysregulation may contribute to immune system disorders.