sentence: A functional block of proteins involved in this Golgi fragmentation step results in inhibition of the severing of the Golgi ribbon and arrest of the cell cycle at the G2 stage ( S ü tterlin et al ., 2001 ; Hidalgo et al ., 2004 ; Yoshimura et al ., 2005 ; Feinstein and Linstedt , 2007 ) .