- Analysis of chromosomal aberrations involving chromosome 1q31-->q53 in a DMBA-induced rat fibrosarcoma cell line: amplification and overexpression of Jak2. Sjöling, A., Lindholm, H., Samuelson, E., Yamasaki, Y., Watanabe, T.K., Tanigami, A., Levan, G. Cytogenet. Cell Genet. (2001)