The ONCOblot Test can detect cancer before clinical symptoms appear. Detects ENOX2 protein species in the blood which is unique to malignant cells and these proteins can be detected at the earliest stages of development with the ONCOblot TestThe ONCOblot Test can detect cancer before clinical symptoms appear. Detects ENOX2 protein species in the blood which is unique to malignant cells and these proteins can be detected at the earliest stages of development with the ONCOblot Test.