Furthermore, the congenic mouse strain C57BL/6.Psl1H6dba, which has a tumor response similar to C57BL/6 when initiated with 100 nmol of DMBA and promoted twice weekly with 6.8 nmol of TPA (Table 2), inherited the DBA/2 allele of Bmp5 (Figure 1B), indicating that Bmp5 does not affect skin tumor promotion susceptibility in genetic crosses of C57BL/6 with DBA/2 mice. The gene discussed is BMP5; the disease is neoplasm.