1	chr21	0	9719767	1	N	9719767	short_arm	no
82	chr21	10210000	10260000	6	N	50000	heterochromatin	no
10	chr21	10260000	13260000	7	N	3000000	centromere	no
904	chr21	41877429	41878628	404	N	1199	clone	no
916	chr21	43505733	43507092	432	N	1359	clone	no
