Fig. 3. a) Control sedimentation profile of uri dine-labelled RNA (30 min pulse)
in a 5-25% sucrose-gradient (e---·e OD260 ; e-e counts per min).
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b) Sedimentation profile of uri dine-labelled RNA (30 min pulse) in a 5-25 %
sucrose gradient 5 hrs after addition of glyoxal (100 fLg/ml) (e·----e OD260 ;
e-e counts per min)