Figure 4. FISH analysis for the X and Y chromosomes.
Analyses were performed on spontaneously arising GPI-negative sub-populations of Jurkat, HBL2, and PR1-C, isolated by sorting and proaerolysin selection. X and Y chromosome centromeric probes generate green and orange fluorescence respectively. Representative interphase and metaphase cells are shown. Spontaneous loss of the Y chromosome was observed, but not the spontaneous loss of the X chromosome in any of the cells analysed by FISH or G-banded karyotyping.