Comparison of telomerase activity in hyperplastic tonsils (lanes 1 through 5), NHLs (lanes 6, 7, 10 through 12), and HD (lanes 8 and 9). The case of NHL (lane 11) and the two cases of HD (lanes 8 and 9) are clearly negative. Lane T corresponds to a positive control (Val cell line). Lane R corresponds to RNase A pretreated sample from the Val cell line.