sh-826466 is the only sh uncovered in a search of 1.2 x 106 kernels. This rate is considerably below the rate in the 1975 c sh wx plot which yielded 18 new sh isolates at the rate of 1 in 6.8 x 10-4. Of course, this differential can be assignable to observer and sh vs. dent complication among the assorted experimental deviations.
Peter A. Peterson
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