Establishment of a human cell line after transformation by a plasmid containing the early region of the SV40 genome

Abstract
A human clonal cell line, designated TAH9, was established from cells of adipose tissue by fusion with Escherichia coli protoplasts containing a recombinant plasmid carrying the early genes of SV40. The establishment of the cell line is preceded by a delayed growth crisis. Apparently after cell transformation, another event(s) of low frequency is required for cell immortalization. Some biological properties of TAH9 cells are also described.