SSA Reaction (IMAGE) Osaka University Caption An in vitro single-strand annealing (SSA) reaction. Compared to the wild-type Rad52, the mutant Rad52-R45K produced limited amounts of the SSA product (upper bands). *, 32P-label. Credit Osaka University Usage Restrictions None 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.