WTF (IMAGE) Stowers Institute for Medical Research Caption Illustration depicting the mechanism and distribution of antidote and poison expression. At the start of meiosis, both proteins are expressed. Later, antidote is only found outside of spores while poison protein is ubiquitous throughout. Finally, the mature spores that inherit wtf4 contain poison and antidote, while the other spores are destroyed. Credit Stowers Institute for Medical Research Usage Restrictions None License Original 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.