A crucial process that regulates development of blood vessels has been discovered by scientists. SerRS (seryl tRNA synthetase) belongs to a family of enzymes that have fundamental, evolutionarily ancient roles in the protein-making machinery of cells. But researchers have been finding in recent years, some of these protein-maker enzymes seem to have evolved extra functions. The finding may lead to treatments for disorders involving abnormal blood vessel growth, including diabetic retinopathy and cancer.