Those are not direct measures of indel rates, those are measures of PigA and CD9 protein levels above the threshold set by the investigators. The main text makes it clear that those percentages should be regarded as background noise, and they adjust for it when comparing CD9 and PigA targeting.
They can't detect the presence of mutants if hey occur at frequencies at or below the background rates. I mentioned this multiple times. Its simply that no one knows if they are present or not. Earlier:
>"You could call that noise of course, at the very least they can't detect rates below those using current methods."
>"Either that or the methods used to measure this are too noisy to detect mutants that exist at those rates."
