During the later phase of pathogenic trypsinogen activation,
at 6 h after caerulein, ARF1 is activated, promoting the formation
of double-membrane compound vacuoles containing both
zymogen granules and microsomal components. In this phase,
BFA prevented autophagic maturation at the step when the
double-membrane autophagic vacuoles were empty or contained
only zymogen granules. Fig. 7 presents a schema illustrating
these distinct phenomena.