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Fig. 8. Mean ± S.E.M. luminance (grayscale from 0-4095) for three
peripheral stolon tips per replicate colony treated with H2DCFDA.
Unfilled bars represent the foreground luminance of the stolon tip; filled
bars represent the background luminance of the surrounding area. (A) Controls;
(B) 0.1 mg ml-1 catalase. Colonies were imaged in a chamber
containing plain seawater immediately after being removed from the treatment
solution.