PTD10, a highly potent PROTAC BTK degrader, exhibits a DC50 of 0.5 nM and a KD of 2.28 nM. It effectively degrades BTK in Ramos and JeKo-1 cells with respective DC50 values of 0.5 nM and 0.6 nM. Additionally, PTD10 inhibits cell growth and triggers apoptosis through the activation of both the caspase-dependent and mitochondrial pathways, making it suitable for research on B-cell dysregulation [1].