Abstract
Abstract Somatic cell hybrids between SV40-transformed human cell lines and mouse peritoneal macrophages (MPM) containing either human chromosome 7 or 17 carrying the SV40 genome were injected into mice syngeneic to the mouse parental cells. Since either chromosome 7 or 17 was the only human chromosome present in the hybrids used as immunogens, the humoral immune response to gene products coded for by either chromosome was assayed. Using a sensitive radioimmunoassay, we were able to identify noncross-reactive cell-surface antigen(s) specifically coded for by either human chromosome 7 or 17, and present in normal, tumorderived and virus-transformed human cells. However, no reactivity against SV40 tumor-specific surface antigen (TSSA) could be detected in the antisera.
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