There are only two isoforms of PDCD2 and MGC13096 containing PDCD2(C) domain in human genome. To study the role of PDCD2_C domain in apoptosis, the cDNAs of two isoforms of PDCD2 and MGC13096 were cloned. The RT-PCR products (AY948416, AY948417) of PDCD2 from RNA of human embryonic kidney 293T (HEK293T) and gastric cancer AGS cell line lost common 99 bp when compared with the sequences of NCBI database (NM_002598, NM_144781). The data of expression of PDCD2 and MGC13096 genes in HEK293T cells which induced to undergo apoptosis by various treatments suggested that there was no significant over-regulation of MGC13096 gene and the over-expression of PDCD2 gene did not occur universally. We searched GEO (Gene Expression Omnibus) about PDCD2 and MGC13096. PDCD2 (NM_002598) was over expressed when endothelial cells treated with leukotriene D4 or natural killer cells were activated by IL-2. Perhaps PDCD2_C domain is not universally associated with apoptosis, the function of PDCD2_C domain needs to be studied further.