sentence: For example , Golgi fragmentation is inhibited via the functional block of the proteins BARS , Polo-like kinase , and Grasp65 , resulting in cell cycle arrest at the G2 stage ( S ü tterlin et al ., 2001 , 2005 ; Colanzi et al ., 2003b ; Preisinger et al ., 2005 ; Feinstein and Linstedt , 2007 ; Duran et al ., 2008 ) .