modal number = 73; range = 63 to 78.
This is a hypertriploid human cell line having the modal chromosome number of 73 occurring in 26% of cells. However, cells having 75 chromosomes also occurred at a high rate (24%). Higher ploidies were found at 0.4%. At least 16 marker chromosomes are common to all metaphases examined: paired del(2)(p2209) and del(9)(p22) and single der(14)t(1;14)(p22;q22), del(3)(p2501), del(7)(q3209), del(10)(p1301), t(13q17q), t(3p13q) and at least eight others. The del(5) (p13), del(7) (q11) and a few others occurred in some, and many others were seen only once. N7 and N21 occurred in 4 or more copies per cell. Most cells had two X and two Y chromosomes.