Signaling by Receptor Tyrosine Kinases (IMAGE) Cold Spring Harbor Laboratory Caption Stylized representations of the 20 different receptor tyrosine kinase families found in humans. Credit Illustration created by J. Schlessinger and M. Lemmon 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.