Three avian lymphoblastoid tumor cell lines were compared for the expression of the serologically complex cell surface antigen, chicken fetal antigen (CFA), and other properties associated with differentiation. Two Marek's disease cell lines (CU-12 and CU-36) and a cell line associated with lymphoid leukosis (CU-10) were all found to differ qualitatively in the expression of CFA. While both Mar...

Chide helper factor (chf) negative chick embryo cells were exposed in the presence of DEAEdextran to chromosomal DNA isolated from avian leukemic myeloblasts which had been induced by infection with the BAI-A strain of avian myeloblastosis virus (AMV) (subgroup B ). After several transfers, avian C-type virus production was observed in the cultures with electron micro­ scopy, although no altera...