Table 3.

Chromosome numbers of colonies of Chinese hamster cells transformed with methylcholanthrene (M) in vitro

Cell type	Metaphases, n	Number of chromosomes per cell	Frequency, %
			<22	22, n22	>22
M1	9	20, 24, 27, 29, 44, 46, 48, 60, 88	11	22	67
M2	9	18, 18, 23, 30, 31, 38, 40, 41, 47	22	0	78
M3	29	13, 19, 19, 20, 20, 21, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 23, 23, 23, 35, 42, 43, 60, 76	21	52	27
M34	12	16, 17, 18, 19, 20, 20, 22, 23, 23, 24, 24, 24	50	8	42
M4	18	20, 21, 21, 22, 22, 22, 22, 22, 22, 23, 23, 23, 23, 24, 27, 29, 30, 42	17	33	50
M5	11	29, 33, 33, 37, 38, 38, 38, 39, 52, 80, 80	0	0	100
M6	19	16, 18, 19, 21, 21, 21, 22, 23, 24, 24, 24, 24, 25, 29, 30, 30, 30, 31, >60	32	5	63
M7	22	16, 19, 19, 20, 21, 21, 21, 22, 22, 22, 22, 22, 22, 22, 22, 22, 23, 23, 24, 24, 24, 26	32	41	27
M8	19	16, 20, 20, 20, 22, 22, 25, 30, 31, 33, 36, 37, 38, 39, 40, 40, 41, 41, 42	21	11	68
M9	10	16, 19, 20, 20, 20, 21, 21, 22, 35, 44	70	20	10
M10	21	16, 16, 20, 20, 20, 21, 21, 22, 22, 22, 22, 22, 22, 22, 22, 24, 30, 33, 34, 35, 56,	33	38	21
M11	10	24, 28, 28, 34, 35, 38, 38, 57, 60, 91	10	0	90
M12	8	20, 21, 23, 34, 36, 38, 40, 51	25	0	75