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Influence of Lrp on expression of gltD::lacZ. Cells were assayed as for Fig. 1. (A) Strain MEW313 (gltD::lacZ lrp/pBADlrp) grown with l-serine (•), with serine and l-leucine (○), and without addition (▴). (B) Curve 1, data of curves 1 (•) and 3 (▴) in panel A plotted against data of curve 3 in Fig. 1B; curve 2, data of curve 2 in panel A plotted against data of curve 4 in Fig. 1B.
