Fig. 2From: The binding affinity of PTPN13’s tandem PDZ2/3 domain is allosterically modulateda Superposition of a representative region of the 2D 1H-15N-HSQC NMR spectra of PDZ2 in the absence (red) and presence of PDZ3 (blue). b Only very minor chemical shift differences could be observed, if at all. The final maximal stoichiometry of PDZ2 and PDZ3 was approximately 1:1Back to article page