Model of Cdc14 Enzyme (image) Purdue University Caption Red areas have identical amino acid sequences in human and yeast Cdc14. The ideal 'key,' or substrate, that would fit into Cdc14 is marked by the green and blue structure nestled into a 'lock' that is the same in human and yeast Cdc14. Credit Molecular Cell/Mark Hall Usage Restrictions Credit Molecular Cell/Mark Hall 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.