Figure 4. Figure 4 Binding site of human PNP. (a) HsPNP-guanosine, (b) HsPNP-inosine, (c) HsPNP-immucillin-H, (d) HsPNP-3'-deoxyguanosine, (e) HsPNP-8-azaguanine, (f) HsPNP-guanine.
