PRLR (Prolactin Receptor): PRLR is a receptor for prolactin, a hormone involved in milk production, reproductive functions, and immunoregulation. Upon binding prolactin, PRLR activates signaling pathways that influence cell growth, development, and differentiation. Dysregulation of PRLR signaling has been implicated in breast and other cancers, highlighting its role in cellular proliferation and potential as a therapeutic target....