cAMP-dependent phosphorylation of PTB1 promotes the expression of insulin secretory granule proteins in beta cells. - Knoch,KP.; Meisterfeld,R.; Kersting,S.; Bergert,H.; Altkruger,A.; Wegbrod,C.; Jager,M.; Saeger,HD.; Solimena,M. (Cell Metab, 2006)