ATM protein expression analysis in MCL.

Relatively high levels of ATM protein expression were detected in samples 15, 16, 18, 19, and 20, similar to those observed in normal tonsil. Partial loss (samples 2, 12) or complete absence (samples 1, 3, 7, 8, 13) of protein expression was detected in several tumors. Expression of PARP in the same samples used as a loading control is shown in the lower panel.