Figure 2.

Superimposed local structures around the four S···O interactions and one S···N interaction observed in PLA₂-DG. Pictures were drawn using the structural data of PDB (Table 1) with d_S···X≤0.05 Å. The sulfur, oxygen, nitrogen, and carbon atoms are shown in yellow, red, blue, and black, respectively. The residue numbers of bovine PLA₂ are indicated. For porcine and human PLA₂, the residue numbers may be different (see the footnotes of Table 1). (A) The S(C44)···O(D40) interaction. (B) The S(C61)···O(A55) interaction. The structures of human PLA₂ [1LE6(A) and 1LE6(B)] are omitted because they are significantly deviated. (C) The S(C84)···O(C96) interaction. (D) The S(C98)···O(F94) interaction. (E) The S(M8)···N(R100) interaction.