Table 1. Regions of missing electron density in human proteins involved in the p53-mediated apoptotic pathways.

Protein name	PDB ID	Regions of missing electron density
TRAIL	1DG6	91–119, 131–141, 195–196
Fibroblast growth factor receptor 2	1DJS 1GJO	297–306 453–466, 504–506, 581–595, 766–768
FAS	3THM	1–35, 92–93, 122–164
PI3K (regulatory subunit)	2XS6	85–108, 202–203, 257–274, 295–298
PI3K (catalytic subunit)	2RD0	1–7, 307–324, 415–423, 506–527, 941–950, 1051–1068
PTEN	1D5R	7–13, 282–285, 309–312, 352–353
AKT	3O96	46–48, 89–91, 114–144, 189–198, 299–312, 430–443
Caspase-3	1CP3	1–34, 174–184
Caspase-6	2WDP	1–30, 166–199, 262–266
Caspase-9	1JXQ	139–147, 296–297, 404–409
Chk2	3I6W	70–91, 228–232, 254–267, 370–401, 502–512
Chk1	1IA8	1, 46–47, 277–289
BCL2	1GM5	1–2
APAF-1	1Z6T	95–104, 587–591