develops from develops into exit glial cell neuroblast NB1-3 ectodermal derivative embryonic/larval PNS subperineurial glial cell embryonic peripheral glial cell embryonic peripheral glial cell 3 2012-01-19T03:05:09Z fly_anatomy.ontology The position of the cell body of ePG3 is variable. It is the most lateral cell of the exit zone 46% of the time, but it can also be found at the positions of ePG1 (8%) or ePG2 (46%). This analysis was done using specific cell markers and taking into account which nerve the cell is associated with (von Hilchen et al., 2008). VFB:FBbt_00110106 FBbt:00110106 ePG3 EGM1 EGM2 EGA Embryonic peripheral glial cell associated with the intersegmental nerve (ISN). It is the most lateral cell located in the transition zone between the CNS and the PNS (exit area), laterally to ePG2. It develops from neuroblast 1-3 (von Hilchen et al., 2008) and gives rise to a subperineurial glial cell (von Hilchen et al., 2013).