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. 2008 May 2;283(18):12202–12211. doi: 10.1074/jbc.M707590200

FIGURE 4.

FIGURE 4.

A, concentration dependence of FRET from CFP-SERCA to YFP-labeled WT (black circles) or I40A (red triangles) PLB. The I40A mutation increased the apparent affinity of PLB for SERCA by 2.9-fold. The affinity of L39Stop-PLB (blue squares) was too low to measure. B, linear dependence of CFP fluorescence on YFP fluorescence, consistent with a bimolecular complex. Data are mean ± S.E.