A split-screen scientific illustration explaining the failure of drug candidate "compound 12". Left side: a small molecule drug (green) binding perfectly to its intended target protein (KRAS), labeled "on-target effect". Right side: the same drug (red) covalently binding to an unintended protein, labeled "off-target binding", causing a muscle cell below to become damaged and waste away. Simple cartoon style, clean white background, educational diagram with arrows and labels Ver más