... that the ability of B-lymphocytes to suppress malignancy in human lymphoid hybrids may be dependent on the corresponding stage of normal B-cell ontogeny, and that suppression is associated with differentiation. malignancy hybrid cells differentiation A comparison of the number of copies of chromosomes...

... and mainly types IV and V procollagen. When hybrid cells in which malignancy is initially suppressed are grown continuously in vitro , the production of type I procollagen declines, and the production of type V procollagen and the release of protease activity into the medium increase. These changes, which...

...Henry Harris ABSTRACT When malignant cells, defined by their ability to grow progressively in genetically compatible hosts, are fused with diploid fibroblasts of the same species, the resulting hybrid cells, so long as they retain certain specific chromosomes donated by the diploid parent cell...