CaM Inhibitor, GSK Inhibitor, HTR3 Inhibitor, PHK Inhibitor, PKC alpha Inhibitor, PKC beta Inhibitor, PKC delta Inhibitor, PKC epsilon Inhibitor, PKC gamma Inhibitor, PKC Inhibitor, SR Inhibitor, Bisindolylmaleimide I (GF 109203X) is a highly selective inhibitor of all PKC isoforms and slight inhibitor of GSK-3