A Five-Gene Wheel Of Drug Resistance (IMAGE) University of Toronto Caption As more ABC transporter genes are deleted, yeast strains gain or lose resistance to drugs. Drug sensitivity (in red) and drug resistance (in blue) are shown relative to the average strain, which contains all the genes and is in the middle of the circle (in black). Credit Albi Celaj Usage Restrictions credit the author License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.