# ucsc	ensembl
chr1	1
chr10	10
chr11	11
chr12	12
chr13	13
chr14	14
chr15	15
chr16	16
chr17	17
chr18	18
chr19	19
chr20	20
chr21	21
chr22	22
chr2A	2a
chr2B	2b
chr3	3
chr4	4
chr5	5
chr6	6
chr7	7
chr8	8
chr9	9
chrM	MT
chrX	X