Animals|Ataxia Telangiectasia Mutated Proteins|Cell Cycle Proteins|Cell Death|DNA Damage|DNA-Binding Proteins|Humans|Models, Theoretical|Protein-Serine-Threonine Kinases|Proto-Oncogene Proteins c-mdm2|Tumor Suppressor Protein p53|Tumor Suppressor Proteins|bcl-2-Associated X Protein