Zebrafish Larva (image) Max-Planck-Gesellschaft Share Print E-Mail Caption Blood vessels of a zebrafish larva: if the gene EGFL7 is lacking, the blood vessels (stained green) are not formed correctly. In genetically unchanged larvae which possess the EGFL7 gene, a substance that blocks EGFL7 leads to disturbances in vessel growth (above). In fish larvae without the EGFL7 gene, however, other genes compensate for the loss, so that the inhibitor hardly affects the growth of blood vessels (below). Credit MPI f. Heart and Lung Research Usage Restrictions Use of images is limited to editorial coverage of scientific topics relating to the activities of the Max Planck Society. Any kind of commercial use (including, in particular, the exploitation of images by means of sale or incorporation in image databases or image catalogues) as well as any promotional use/use for merchandise purposes, disclosure to third parties or granting of related rights to third parties is expressly not permitted. 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.