Karyotype:The line has a near pentaploid chromosome number and a wide range of chromosome number distribution (40% of the cells had numbers ranging from 110 to 115). The following 14 markers were found in most metaphases: t(1p,2p), t(3p,?), t(4p,11q), t(7p,22q), M6, t(9q,?), i(11q)18q t(10q,?), M14, M15, M16, M17 and t(10q,22q), 6 of these were found in some and 10 were seen in one only. Normal chromosomes 7, 8, 12, 19, 20 and 22 had 5 to 6 copies per cell, the x had two copies and the Y was absent.