Figure 4. The comparison of LDD and LDD-like motifs in KRs.

The LDD and LDD-like motifs are shown as sticks and colored by elements. The rest of the molecules are shown as ribbons and colored in green. (a) The IRD motif in SiaM. The IRD motif is a degenerate form of LDD motif, with a hydrophobic residue occupying the first position and an aspartic acid occupying the third position. (b) The LGG motif in ActKR. (c) The LDD motif in TylKR1. (d) The LDD motif in EryKR1.