Confocal immunofluorescence assay demonstrated that LCDV was co - localized with VDAC2 and RACK1 , CTB was co - localized with VDAC2 and RACK1 and partially with LCDV , but transferrin was not co - localized with LCDV , VDAC2 , or RACK1 , indicating that LCDV utilized the same pathway as CTB ,