Frog and Human Brain (image) University of Toronto Share Print E-Mail Caption This image shows a frog and human brain, brought to scale. Although the brain-building genes are similar in both, alternative splicing ensures greater protein diversity in human cells, which fuels organ complexity. Credit Jovana Drinjakovic Usage Restrictions None Share Print E-Mail 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.