https://www.folate-analogue.com/index.php/2016/04/11/pten-has-a-substrate-specificity-toward-pithree45p3-49-and-is-composed-of-n-terminal-phosphoinositide-binding-motif-pbm-that-contributes-to-the-recruitment-of-pten-to-the-pm-phosphatase-domai/