Reviewed by ICLAC (ref: 191110). MGC-803 was reported to originally come from gastric carcinoma but several papers from cell repositories in China have shown that it has a high similarity to HeLa. Looking at the STR profiles that we have available, they appear to fall into two groups. One is consistent with HeLa, while the other has additional alleles at many loci e.g. Penta E has "7,10,16,17". This second group of samples may represent a mixture of HeLa and a second cell line; it may also represent a hybrid cell line (e.g., following exposure to a fusogenic agent).