passages.id: split_6_test_2908_passage
passages.type: progene_text
passages.text: When compared with DCs generated in the presence of GM-CSF and IL-4 ( IL-4 - derived DCs ) , IFN - DCs exhibited a typical DC morphology and expressed , in addition to DC markers CD1a and blood DC Ag 4 , a similar level of costimulatory and class II MHC molecules , but a significantly higher level of MHC class I molecules .