Cell fusion results assigning 8 FA cell lines to 2 new complementation groups, I and J. Each box indicates a fusion experiment between 2 cell lines, for instance, the one on top of the vertical column and the one at the end of the horizontal row. Figures are IC50 values for MMC (means ± standard deviations). Values higher than 10 nM are complemented hybrids; values lower than 10 nM (bold face) are noncomplemented hybrids. Empty cells: no data available, either because fusions had failed multiple times or because the combination of properly marked parental cell lines was not available. EUFA592 failed to complement EUFA816, BD952, and EUFA961, defining complementation group I. EUFA543 failed to complement EUFA696, AG656, EUFA1333, defining group J.
