Figure 2.

Evidence from PDB structural data – SH3 domain vs. PxxPxR. 3D structure (PDB ID: 1AVZ) of a SH3 domain of FYN tyrosine kinase bound to with another protein. The sequence segments that express the "PxxPxR" motif and "GxxPxNY" motif (detected by D-STAR in this work) are highlighted in dark blue and orange respectively. The two segments correspond to actual interacting subsequences.