(IMAGE) Goethe University Frankfurt Caption Like scissors, the enzyme TSEN shapes tRNA (colored) by removing parts of the precursor molecule pre-tRNA. Credit Trowitzsch Lab, Goethe University Frankfurt Usage Restrictions To be used only when reporting on Goethe University Frankfurt. Mention copyright as Trowitzsch Lab, Goethe University Frankfurt 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.