Enables ATP binding activity; growth factor binding activity; and vascular endothelial growth factor-activated receptor activity. Involved in several processes, including liver regeneration; negative regulation of vascular endothelial growth factor production; and positive regulation of cell population proliferation. Located in extracellular space and plasma membrane. Used to study corneal neovascularization. Biomarker of breast cancer; diabetic retinopathy; liver cirrhosis; myocardial infarction; and vascular dementia. Human ortholog(s) of this gene implicated in Kuhnt-Junius degeneration; diabetic retinopathy; and pre-eclampsia. Orthologous to human FLT1 (fms related receptor tyrosine kinase 1).