growth factors
Brain angiogenesis is a tightly controlled process that is regulated by       neuroectodermal derived growth factors that bind to tyrosine kinase receptors       expressed on endothelial cells.
Brain angiogenesis is a tightly controlled process that is regulated by       neuroectodermal derived  @SUBJECT$  that  @PREDICAT$  to  @OBJECT$        expressed on endothelial cells.