Ribosomes (IMAGE) Weizmann Institute of Science Caption Ribosomes (large, dark circles) working their way down a strand of mRNA. Proteins are forming to the top and bottom. Amino acid scarcity results in ribosome logjams Credit the Weizmann Institute of Science 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.