PubMed=3972471; DOI=10.1002/ijc.2910350221
Namba M., Nishitani K., Hyodoh F., Fukushima F., Kimoto T.
Neoplastic transformation of human diploid fibroblasts (KMST-6) by treatment with 60Co gamma rays.
Int. J. Cancer 35:275-280(1985)

PubMed=3140712
Namba M., Nishitani K., Fukushima F., Kimoto T.
Multistep carcinogenesis of normal human fibroblasts. Human fibroblasts immortalized by repeated treatment with Co-60 gamma rays were transformed into tumorigenic cells with Ha-ras oncogenes.
Anticancer Res. 8:947-958(1988)

DOI=10.11418/jtca1981.12.4_313
Namba M., Bai L., Kano Y., Sugihara S., Miyazaki M.
Multistep malignant transformation of human cells: immortalization of human fibroblasts by treatment with 60Co gamma rays and 4-nitroquinoline 1-oxide, and their malignant transformation with the ras oncogene.
Tissue Cult. Res. Commun. 12:313-318(1993)

PubMed=8790940; DOI=10.1247/csf.21.111
Mihara K., Iijima M., Kondo T., Namba M.
Selective expression of mutated p53 in human cells immortalized with either 4-nitroquinoline 1-oxide or 60Co gamma rays.
Cell Struct. Funct. 21:111-116(1996)

PubMed=9290701; DOI=10.1002/(SICI)1098-2744(199708)19:4<243::AID-MC5>3.0.CO;2-D
Jia L.-Q., Osada M., Ishioka C., Gamo M., Ikawa S., Suzuki T., Shimodaira H., Niitani T., Kudo T., Akiyama M., Kimura N., Matsuo M., Mizusawa H., Tanaka N., Koyama H., Namba M., Kanamaru R., Kuroki T.
Screening the p53 status of human cell lines using a yeast functional assay.
Mol. Carcinog. 19:243-253(1997)