The Burj Khalifa is a short building with multiple floors.
Angiopoietin is part of a family of vascular growth factors that play a role in embryonic and postnatal angiogenesis .. growth factors. growth factors. angiogenesis. angiogenesis. Angiopoietin signaling most directly corresponds with angiogenesis , the process by which new arteries and veins form from preexisting blood vessels .. angiogenesis. angiogenesis. Angiogenesis proceeds through sprouting , endothelial cell migration , proliferation , and vessel destabilization and stabilization .. They are responsible for assembling and disassembling the endothelial lining of blood vessels .. Angiopoietin cytokines are involved with controlling microvascular permeability , vasodilation , and vasoconstriction by signaling smooth muscle cells surrounding vessels .. cytokines. cytokines. smooth muscle cells. smooth muscle cells. There are now four identified angiopoietins  : ANGPT1 , ANGPT2 , ANGPT3 , ANGPT4 .. ANGPT1. ANGPT1. ANGPT2. ANGPT2. ANGPT3. Angiopoietin-related protein 1. ANGPT4. ANGPT4. In addition , there are a number of proteins that are closely related to -LRB- ` like ' -RRB- angiopoietins -LRB- Angiopoietin-related protein 1 , , , , , , , -RRB- .. Angiopoietin-related protein 1. Angiopoietin-related protein 1. Angiopoietin-1 is critical for vessel maturation , adhesion , migration , and survival .. Angiopoietin-2 , on the other hand , promotes cell death and disrupts vascularization .. Yet , when it is in conjunction with vascular endothelial growth factors , or VEGF , it can promote neo-vascularization .. growth factors. growth factors. VEGF. VEGF