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Fig. 9. Glycerol gradient analysis of unmutated and mutated forms of Dd-STATb. Two mutant versions of Dd-STATb, and the unmutated Dd-STATb, were cloned downstream of the constitutive actin 15 promoter; in LR residue L1025 is converted to arginine and in YF residue Y1143 is converted to phenylalanine. These three DNAs were stably transformed into Dictyostelium using G418 as the selective agent. This yields multiple copies of the transforming DNA, the number varying from cell. Clones with a high expression level were selected and analysed as described in the legend to Fig. 7. Scale bar: 10 µm.





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